Method and apparatus for applying slot format indication (SFI) to a cell in unlicensed spectrum in a wireless communication system

ABSTRACT

A method and apparatus are disclosed. In an example from the perspective of a User Equipment (UE), a Slot Format Indication (SFI) is received within a first Channel Occupancy Time (COT) of a serving cell. The SFI is indicative of one or more slot formats of one or more slots of the serving cell. A first signal indicative of an ending position of the first COT is received. A beginning of at least one slot of the one or more slots is after the ending position. The UE determines whether to apply a slot format, of a slot of the one or more slots, to the slot based upon whether the slot is within the first COT, wherein the slot format of the slot is indicated by the SFI.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims the benefit of U.S. Provisional PatentApplication Ser. No. 62/717,241 filed on Aug. 10, 2018, the entiredisclosure of which is incorporated herein in its entirety by reference.

FIELD

This disclosure generally relates to wireless communication networks,and more particularly, to a method and apparatus for applying a SlotFormat Indication (SFI) to a cell in unlicensed spectrum in a wirelesscommunication system.

BACKGROUND

With the rapid rise in demand for communication of large amounts of datato and from mobile communication devices, traditional mobile voicecommunication networks are evolving into networks that communicate withInternet Protocol (IP) data packets. Such IP data packet communicationcan provide users of mobile communication devices with voice over IP,multimedia, multicast and on-demand communication services.

An exemplary network structure is an Evolved Universal Terrestrial RadioAccess Network (E-UTRAN). The E-UTRAN system can provide high datathroughput in order to realize the above-noted voice over IP andmultimedia services. A new radio technology for the next generation(e.g., 5G) is currently being discussed by the 3GPP standardsorganization. Accordingly, changes to the current body of 3GPP standardare currently being submitted and considered to evolve and finalize the3GPP standard.

SUMMARY

In accordance with the present disclosure, one or more devices and/ormethods are provided. In an example from the perspective of a UserEquipment (UE), a Slot Format Indication (SFI) is received within afirst Channel Occupancy Time (COT) of a serving cell. The SFI isindicative of one or more slot formats of one or more slots of theserving cell. A first signal indicative of an ending position of thefirst COT is received. A beginning of at least one slot of the one ormore slots is after the ending position. The UE determines whether toapply a slot format, of a slot of the one or more slots, to the slotbased upon whether the slot is within the first COT, wherein the slotformat of the slot is indicated by the SFI.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a diagram of a wireless communication system according toone exemplary embodiment.

FIG. 2 is a block diagram of a transmitter system (also known as accessnetwork) and a receiver system (also known as user equipment or UE)according to one exemplary embodiment.

FIG. 3 is a functional block diagram of a communication system accordingto one exemplary embodiment.

FIG. 4 is a functional block diagram of the program code of FIG. 3according to one exemplary embodiment.

FIG. 5A illustrates a first portion of a table associated with slotformats in a normal Cyclic Prefix (CP).

FIG. 5B illustrates a second portion of a table associated with slotformats in a normal CP.

FIG. 6A illustrates a table associated with orthogonalfrequency-division multiplexing (OFDM) numerologies.

FIG. 6B illustrates a table associated with a number of OFDM symbols perslot, a number of slots per frame and a number of slots per subframe fora normal CP.

FIG. 7A illustrates an exemplary TDD-UL-DL-Config information element.

FIG. 7B illustrates an exemplary SlotFormatCombinationsPerCellinformation element.

FIG. 7C illustrates an exemplary SlotFormatIndicator informationelement.

FIG. 8A illustrates a table comprising supported Downlink ControlInformation (DCI) formats.

FIG. 8B illustrates a table associated with channel access priorityclasses.

FIG. 9A illustrates an exemplary scenario associated with slot formatsof slots.

FIG. 9B illustrates a representation of slots associated with a SlotFormat Indication (SFI) related DCI associated with the exemplaryscenario of FIG. 9A.

FIG. 10 is a flow chart according to one exemplary embodiment.

FIG. 11 is a flow chart according to one exemplary embodiment.

DETAILED DESCRIPTION

The exemplary wireless communication systems and devices described belowemploy a wireless communication system, supporting a broadcast service.Wireless communication systems are widely deployed to provide varioustypes of communication such as voice, data, and so on. These systems maybe based on code division multiple access (CDMA), time division multipleaccess (TDMA), orthogonal frequency division multiple access (OFDMA),3^(rd) Generation Partnership Project (3GPP) LTE (Long Term Evolution)wireless access, 3GPP LTE-A or LTE-Advanced (Long Term EvolutionAdvanced), 3GPP2 UMB (Ultra Mobile Broadband), WiMax, or some othermodulation techniques.

In particular, the exemplary wireless communication systems devicesdescribed below may be designed to support one or more standards such asthe standard offered by a consortium named “3rd Generation PartnershipProject” referred to herein as 3GPP, including: 3GPP TS 38.213 V15.2.0,3rd Generation Partnership Project, “Technical Specification Group RadioAccess Network”, “NR”, “Physical layer procedures for control”, Release15; 3GPP TS 38.211 V15.2.0, 3rd Generation Partnership Project;“Technical Specification Group Radio Access Network”, “NR”, “Physicalchannels and modulation”, Release 15; Final Report of 3GPP TSG RAN WG1#AH_1801 v1.0.0, Vancouver, Canada, 22-26 Jan. 2018; Final Report of3GPP TSG RAN WG1 #92 v1.0.0, Athens, Greece, 26 February-2 Mar. 2018;Final Report of 3GPP TSG RAN WG1 #92bis v1.0.0, Sanya, China, 16-20 Apr.2018; Draft Report of 3GPP TSG RAN WG1 #93 v0.2.0, Busan, South Korea,21-25 May 2018; 3GPP TS 38.331 V15.2.0, 3rd Generation PartnershipProject, “Technical Specification Group Radio Access Network”, “NR”,“Radio Resource Control (RRC) protocol specification”, Release 15;R1-1807386, “TxOP Frame Structure for NR unlicensed”, QualcommIncorporated; R1-1806105, “Frame structure for NR-U operation”, Nokia,Nokia Shanghai Bell; 3GPP TS 38.212 V15.2.0, 3rd Generation PartnershipProject; “Technical Specification Group Radio Access Network”, “NR”,“Multiplexing and channel coding”, Release 15; 3GPP TS 36.213 V15.1.0(2018-03), 3rd Generation Partnership Project, “Technical SpecificationGroup Radio Access Network”, “NR”, “Physical layer procedures”, Release15; 3GPP TS 37.213 V15.0.0 (2018-06), 3rd Generation PartnershipProject, “Technical Specification Group Radio Access Network”, “NR”,“Physical layer procedures for shared spectrum channel access”, Release15. The standards and documents listed above are hereby expresslyincorporated by reference in their entirety.

FIG. 1 presents a multiple access wireless communication system inaccordance with one or more embodiments of the disclosure. An accessnetwork 100 (AN) includes multiple antenna groups, one including 104 and106, another including 108 and 110, and an additional including 112 and114. In FIG. 1, only two antennas are shown for each antenna group,however, more or fewer antennas may be utilized for each antenna group.Access terminal 116 (AT) is in communication with antennas 112 and 114,where antennas 112 and 114 transmit information to access terminal 116over forward link 120 and receive information from access terminal 116over reverse link 118. AT 122 is in communication with antennas 106 and108, where antennas 106 and 108 transmit information to AT 122 overforward link 126 and receive information from AT 122 over reverse link124. In a frequency-division duplexing (FDD) system, communication links118, 120, 124 and 126 may use different frequencies for communication.For example, forward link 120 may use a different frequency than thatused by reverse link 118.

Each group of antennas and/or the area in which they are designed tocommunicate is often referred to as a sector of the access network. Inthe embodiment, antenna groups each may be designed to communicate toaccess terminals in a sector of the areas covered by access network 100.

In communication over forward links 120 and 126, the transmittingantennas of access network 100 may utilize beamforming in order toimprove the signal-to-noise ratio of forward links for the differentaccess terminals 116 and 122. Also, an access network using beamformingto transmit to access terminals scattered randomly through its coveragemay normally cause less interference to access terminals in neighboringcells than an access network transmitting through a single antenna toall its access terminals.

An access network (AN) may be a fixed station or base station used forcommunicating with the terminals and may also be referred to as anaccess point, a Node B, a base station, an enhanced base station, anevolved Node B (eNB), a gNB, a network node, a network, or some otherterminology. An access terminal (AT) may also be called user equipment(UE), a wireless communication device, terminal, access terminal or someother terminology.

FIG. 2 presents an embodiment of a transmitter system 210 (also known asthe access network) and a receiver system 250 (also known as accessterminal (AT) or user equipment (UE)) in a multiple-input andmultiple-output (MIMO) system 200. At the transmitter system 210,traffic data for a number of data streams may be provided from a datasource 212 to a transmit (TX) data processor 214.

In one embodiment, each data stream is transmitted over a respectivetransmit antenna. TX data processor 214 formats, codes, and interleavesthe traffic data for each data stream based on a particular codingscheme selected for that data stream to provide coded data.

The coded data for each data stream may be multiplexed with pilot datausing orthogonal frequency-division multiplexing (OFDM) techniques. Thepilot data may typically be a known data pattern that is processed in aknown manner and may be used at the receiver system to estimate thechannel response. The multiplexed pilot and coded data for each datastream may then be modulated (i.e., symbol mapped) based on a particularmodulation scheme (e.g., binary phase shift keying (BPSK), quadraturephase shift keying (QPSK), M-ary phase shift keying (M-PSK), or M-aryquadrature amplitude modulation (M-QAM)) selected for that data streamto provide modulation symbols. The data rate, coding, and/or modulationfor each data stream may be determined by instructions performed byprocessor 230.

The modulation symbols for all data streams are then provided to a TXMIMO processor 220, which may further process the modulation symbols(e.g., for OFDM). TX MIMO processor 220 then provides N_(T) modulationsymbol streams to N_(T) transmitters (TMTR) 222 a through 222 t. Incertain embodiments, TX MIMO processor 220 may apply beamforming weightsto the symbols of the data streams and to the antenna from which thesymbol is being transmitted.

Each transmitter 222 receives and processes a respective symbol streamto provide one or more analog signals, and further conditions (e.g.,amplifies, filters, and/or upconverts) the analog signals to provide amodulated signal suitable for transmission over the MIMO channel. N_(T)modulated signals from transmitters 222 a through 222 t may then betransmitted from N_(T) antennas 224 a through 224 t, respectively.

At receiver system 250, the transmitted modulated signals are receivedby N_(R) antennas 252 a through 252 r and the received signal from eachantenna 252 may be provided to a respective receiver (RCVR) 254 athrough 254 r. Each receiver 254 may condition (e.g., filters,amplifies, and downconverts) a respective received signal, digitize theconditioned signal to provide samples, and/or further processes thesamples to provide a corresponding “received” symbol stream.

An RX data processor 260 then receives and/or processes the N_(R)received symbol streams from N_(R) receivers 254 based on a particularreceiver processing technique to provide N_(T) “detected” symbolstreams. The RX data processor 260 may then demodulate, deinterleave,and/or decode each detected symbol stream to recover the traffic datafor the data stream. The processing by RX data processor 260 may becomplementary to that performed by TX MIMO processor 220 and TX dataprocessor 214 at transmitter system 210.

A processor 270 may periodically determine which pre-coding matrix touse (discussed below). Processor 270 formulates a reverse link messagecomprising a matrix index portion and a rank value portion.

The reverse link message may comprise various types of informationregarding the communication link and/or the received data stream. Thereverse link message may then be processed by a TX data processor 238,which may also receive traffic data for a number of data streams from adata source 236, modulated by a modulator 280, conditioned bytransmitters 254 a through 254 r, and/or transmitted back to transmittersystem 210.

At transmitter system 210, the modulated signals from receiver system250 are received by antennas 224, conditioned by receivers 222,demodulated by a demodulator 240, and processed by a RX data processor242 to extract the reserve link message transmitted by the receiversystem 250. Processor 230 may then determine which pre-coding matrix touse for determining the beamforming weights and may then process theextracted message.

FIG. 3 presents an alternative simplified functional block diagram of acommunication device according to one embodiment of the disclosedsubject matter. As shown in FIG. 3, the communication device 300 in awireless communication system can be utilized for realizing the UEs (orATs) 116 and 122 in FIG. 1 or the base station (or AN) 100 in FIG. 1,and the wireless communications system is preferably the LTE system. Thecommunication device 300 may include an input device 302, an outputdevice 304, a control circuit 306, a central processing unit (CPU) 308,a memory 310, a program code 312, and a transceiver 314. The controlcircuit 306 executes the program code 312 in the memory 310 through theCPU 308, thereby controlling an operation of the communications device300. The communications device 300 can receive signals input by a userthrough the input device 302, such as a keyboard or keypad, and canoutput images and sounds through the output device 304, such as amonitor or speakers. The transceiver 314 is used to receive and transmitwireless signals, delivering received signals to the control circuit306, and outputting signals generated by the control circuit 306wirelessly. The communication device 300 in a wireless communicationsystem can also be utilized for realizing the AN 100 in FIG. 1.

FIG. 4 is a simplified block diagram of the program code 312 shown inFIG. 3 in accordance with one embodiment of the disclosed subjectmatter. In this embodiment, the program code 312 includes an applicationlayer 400, a Layer 3 portion 402, and a Layer 2 portion 404, and iscoupled to a Layer 1 portion 406. The Layer 3 portion 402 may performradio resource control. The Layer 2 portion 404 may perform linkcontrol. The Layer 1 portion 406 may perform and/or implement physicalconnections.

3GPP TS 38.213 V15.2.0 provides information associated with Radio AccessTechnology (RAT) and/or New RAT (NR), Physical Downlink Control Channel(PDCCH) monitoring, slot format, frame structure and Bandwidth Part(BWP). In some examples, for each downlink BWP configured to a UE in aserving cell, the UE is provided by higher layers with S≥10 search spacesets where, for each search space set from the S search space sets, theUE is provided with one or more of the following by a higher layerparameter (e.g., higher layer parameter SearchSpace): a search space setindex s, where 0≤s<40, by a higher layer parameter searchSpaceId; anassociation between the search space set s and a control resource set pby a higher layer parameter controlResourceSedd; a PDCCH monitoringperiodicity of k_(p,s) slots and/or a PDCCH monitoring offset of o_(p,s)slots, by higher layer parameter monitoringSlotPeriodicityAndOffset; aPDCCH monitoring pattern within a slot, indicating one or more firstsymbols of the control resource set within a slot for PDCCH monitoring,by higher layer parameter monitoringSymbolsWithinSlot; a number of PDCCHcandidates M_(p,s) ^((L)) per Control Channel Element (CCE) aggregationlevel L by higher layer parameters aggregationLevel1, aggregationLevel2,aggregationLevel4, aggregationLevel8, and/or aggregationLevel16, for CCEaggregation level 1, CCE aggregation level 2, CCE aggregation level 4,CCE aggregation level 8 and/or CCE aggregation level 16, respectively;an indication that the search space set s is a common search space setor a UE-specific search space set by higher layer parametersearchSpaceType.

In some examples, if the search space set s is a common search spaceset, the UE is provided with one or more of the following by the higherlayer parameter SearchSpace: an indication by higher layer parameterdci-Format0-0-AndFormat1-0 to monitor PDCCH candidates for DownlinkControl Information (DCI) format 0_0 and DCI format 1_0 with CyclicRedundancy Checksum (CRC) scrambled by a Cell Radio Network TemporaryIdentifier (RNTI) (C-RNTI), a Configured Scheduling (CS) RNTI (CS-RNTI)(if configured), a Random Access RNTI (RA-RNTI), a Temporary Cell RNTI(TC-RNTI), Paging RNTI (P-RNTI) and/or a System Information RNTI(SI-RNTI); an indication by higher layer parameter dci-Format2-0 tomonitor one or more PDCCH candidates for DCI format 2_0 and/or acorresponding CCE aggregation level; an indication by higher layerparameter dci-Format2-1 to monitor PDCCH candidates for DCI format 2_1;an indication by higher layer parameter dci-Format2-2 to monitor PDCCHcandidates for DCI format 2_2; an indication by higher layer parameterdci-Format2-3 to monitor PDCCH candidates for DCI format 2_3. In someexamples, if the search space set s is a UE-specific search space set,the UE is provided with the following by the higher layer parameterSearchSpace: an indication by higher layer parameter dci-Formats tomonitor PDCCH candidates either for DCI format 0_0 and DCI format 1_0 orfor DCI format 0_1 and DCI format 1_1.

In some examples, the UE is also provided with, via higher layerparameter duration, a duration of T_(p,s)<k_(p,s) slots indicative of anumber of slots that the search space set s comprises. In some examples,if the higher layer parameter monitoringSymbolsWithinSlot indicates to aUE only one PDCCH monitoring occasion within a slot, the UE does notexpect to be configured with a PDCCH subcarrier spacing other than 15kHz for the corresponding search space set s if the control resource setp associated with the search space set s includes at least one symbolafter the third symbol of the slot.

If the UE is configured with a Secondary Cell Group (SCG), the UE mayapply and/or perform one or more procedures associated with a MasterCell Group (MCG) and/or the SCG. In some examples, in association withprocedures that are applied for the MCG, the terms ‘secondary cell’,‘secondary cells’, ‘serving cell’ and/or ‘serving cells’ may refer tosecondary cell, secondary cells, serving cell and/or serving cellsassociated with the MCG, respectively. In some examples, in associationwith procedures that are applied for the SCG, the terms ‘secondarycell’, ‘secondary cells’, ‘serving cell’ and/or ‘serving cells’ mayrefer to secondary cell, secondary cells (not including PrimarySecondary Cell (PSCell)), serving cell and/or serving cells associatedwith the SCG, respectively. Alternatively and/or additionally, the term‘primary cell’ may refer to the PSCell of the SCG.

In some examples, a slot format includes downlink symbols, uplinksymbols and flexible symbols. In some examples, for each serving cell,if a UE is provided with higher layer parametertdd-UL-DL-Configuration-Common and/or the UE is not provided with ahigher layer parameter tdd-UL-DL-Configuration-Common2, the UE sets theslot format per slot per slot over a number of slots as indicated by thehigher level parameter tdd-UL-DL-Configuration-Common. In some examples,the higher level parameter tdd-UL-DL-Configuration-Common provides oneor more of the following: a reference subcarrier spacing μ_(ref) byhigher layer parameter referenceSubcarrierSpacing; a slot configurationperiod of P ms (milliseconds) by higher layer parameterdl-UL-TransmissionPeriodicity; a number of slots d_(slots) with onlydownlink symbols by higher layer parameter nrofDownlinkSlots; a numberof downlink symbols d_(sym) by higher layer parameternrofDownlinkSymbols; a number of slots u_(slots) with only uplinksymbols by higher layer parameter nrofUplinkSlots; a number of uplinksymbols u_(sym) by higher layer parameter nrofUplinkSymbols.

In some examples, a value P=0.625 ms is valid for μ_(ref)−3. In someexamples, a value P=1.25 ms is valid is valid for μ_(ref)−2 and/orμ_(ref)−3. In some examples, a value P=2.5 ms is valid for μ_(ref)−1,μ_(ref)−2 and/or μ_(ref)−3

In some examples, a slot configuration period of P (ms) includesS=P×2^(μref) slots with μ_(ref) subcarrier spacing. In some examples,from the S slots, a first d_(slots) slots include merely downlinksymbols and/or a last u_(slots) slots include merely uplink symbols. Insome examples, the d_(sym) symbols after the first d_(slots) aredownlink symbols. In some examples, the u_(sym) symbols before the lastu_(slots) slots are uplink symbols. In some examples, remaining symbols(e.g., (S−d_(slots)−u_(slots))×N_(symb) ^(slot)−d_(sym)−u_(sym) symbols)are flexible symbols.

In some examples, a first symbol every 20/P periods is a first symbol inan event frame. In some examples, a UE expects that the referencesubcarrier spacing μ_(ref) is smaller than or equal to the subcarrierspacing μ for one or more BWPs of configured downlink BWPs and/or uplinkBWPs.

In some examples, if the UE is provided with higher layer parameterstdd-UL-DL-ConfigurationCommon and tdd-UL-DL-ConfigurationCommon2, the UEsets the slot format per slot over a first number of slots as indicatedby higher layer parameter tdd-UL-DL-ConfigurationCommon and the UE setsthe slot format per slot over a second number of slots as indicated bytdd-UL-DL-ConfigurationCommon2. In some examples, In some examples, thehigher level parameter tdd-UL-DL-Configuration-Common2 provides one ormore of the following: a reference subcarrier spacing μ_(ref,2) byhigher layer parameter referenceSubcarrierSpacing; a slot configurationperiod of P₂ ms by higher layer parameter dl-UL-TransmissionPeriodicity;a number of slots d_(slots,2) with only downlink symbols by higher layerparameter nrofDownlinkSlots; a number of downlink symbols d_(sym,2) byhigher layer parameter nrofDownlinkSymbols; a number of slotsu_(slots,2) with only uplink symbols by higher layer parameternrofUplinkSlots; a number of uplink symbols u_(sym,2) by higher layerparameter nrofUplinkSymbols.

In some examples, a UE expects the subcarrier spacing μ to beμ_(ref)−μ_(ref,2). In some examples, a value P₂=0.625 ms is valid forμ_(ref,2)−3. In some examples, a value P₂=1.25 ms is valid is valid forμ_(ref,2)−2 and/or μ_(ref,2)−3. In some examples, a value P₂=2.5 ms isvalid for μ_(ref,2)−1, μ_(ref,2)−2 and/or μ_(ref,2)−3

In some examples, a slot configuration period of P+P₂ slots includesfirst S=P×2^(μref) slots and/or second S₂=P₂×2^(μref) slots. In someexamples, from the S₂ slots, a first d_(slots,2) slots include merelydownlink symbols and/or a last u_(slots,2) slots include merely uplinksymbols. In some examples, the d_(sym),2 symbols after the firstd_(slots,2) are downlink symbols. In some examples, the u_(sym,2)symbols before the last u_(slots,2) slots are uplink symbols. In someexamples, remaining symbols (e.g., (S₂−d_(slots,2)−u_(slots,2))×N_(symb)^(slot)−d_(sym,2)−u_(sym,2) symbols) are flexible symbols. In someexamples, the UE expects that P+P₂ divides 20 ms. In some examples, afirst symbol every 20/(P+P₂) periods is a first symbol in an eventframe.

In some examples, if the UE is provided with higher layer parametertdd-UL-DL-ConfigDedicated, the higher layer parametertdd-UL-DL-ConfigDedicated overrides flexible symbols per slot over anumber of slots provided by tdd-UL-DL-ConfigurationCommon and/ortdd-UL-DL-ConfigurationCommon2. In some examples, the higher layerparameter tdd-UL-DL-ConfigDedicated provides one or more of thefollowing: a set of slot configurations by higher layer parameterslotSpecificConfigurationsToAddModList; a slot index for a slot providedby higher layer parameter slotIndex for each slot configuration of a setof slot configurations; a set of symbols for a slot by higher layerparameter symbols for each slot configuration of the set of slotconfigurations, where if the higher layer parameter symbols=allDownlink,all symbols in the slot are downlink, if the higher layer parametersymbols=allUplink, all symbols in a slot are uplink, if the higher layerparameter symbols=explicit and if a higher layer parameternrofDownlinkSymbols is not provided, there are no downlink first symbolsin the slot and/or if the higher layer parameter symbols=explicit and ifa higher layer parameter nrofUplinkSymbols is not provided, there are nouplink last symbols in the slot where remaining symbols in the slot areflexible. In some examples, the higher layer parameternrofDownlinkSymbols provides a number of downlink first symbols in theslot and the higher layer parameter nrofUplinkSymbols provides a numberof uplink last symbols in the slot. In some examples, remaining symbolsin the slot are flexible.

In some examples, for each slot having a corresponding index provided byhigher layer parameter slotIndex, the UE applies a format provided bythe higher layer parameter symbols. In some examples, the UE does notexpect tdd-UL-DL-ConfigDedicated to be indicative of a symbol beinguplink if the symbol is defined to be downlink by higher layer parametertdd-UL-DL-ConfigurationCommon and/or higher layer parametertdd-UL-DL-ConfigurationCommon2. In some examples, the UE does not expecttdd-UL-DL-ConfigDedicated to be indicative of a symbol being downlink ifthe symbol is defined to be uplink by higher layer parametertdd-UL-DL-ConfigurationCommon and/or higher layer parametertdd-UL-DL-ConfigurationCommon2.

In some examples, for each slot configuration provided by higher layerparameter tdd-UL-DL-ConfigDedicated, a reference subcarrier spacing isthe reference subcarrier spacing μ_(ref) provided by higher layerparameter tdd-UL-DL-ConfigurationCommon.

In some examples, a slot configuration period and/or a number ofdownlink symbols, uplink symbols and/or flexible symbols in each slot ofthe slot configuration period are determined from higher layerparameters tdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationCommon2and/or tdd-UL-DL-ConfigDedicated and are common to each configured BWP.

In some examples, a UE considers symbols in a slot indicated as downlinkby higher layer parameters tdd-UL-DL-ConfigurationCommon,tdd-UL-DL-ConfigurationCommon2 and/or tdd-UL-DL-ConfigDedicated to beavailable for receptions (of data) and/or the UE considers symbols in aslot indicated as uplink by higher layer parameterstdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationCommon2 and/or bytdd-UL-DL-ConfigDedicated to be available for transmissions (of data).

In some examples, if a UE is not configured to monitor PDCCH for DCIformat 2-0 and/or if a set of symbols of a slot are indicated asflexible by higher layer parameters tdd-UL-DL-ConfigurationCommon,tdd-UL-DL-ConfigurationCommon2 and/or tdd-UL-DL-ConfigDedicated (and/orwhen higher layer parameters tdd-UL-DL-ConfigurationCommon,tdd-UL-DL-ConfigurationCommon2 and/or tdd-UL-DL-ConfigDedicated are notprovided to the UE), one or more operations may be performed by the UE.In some examples, the one or more operations comprise receiving PhysicalDownlink Shared Channel (PDSCH) and/or Channel State Information basedReference Signal (CSI-RS) in the set of symbols of the slot if the UEreceives a corresponding indication by a DCI format 1_0, a DCI format1_1 and/or a DCI format 0_1. In some examples, the one or moreoperations comprise transmitting Physical Uplink Shared Channel (PUSCH),Physical Uplink Control Channel (PUCCH), Physical Random Access Channel(PRACH) and/or Sounding Reference Signal (SRS) in the set of symbols ofthe slot if the UE receives a corresponding indication by a DCI format0_0, DCI format 0_1, DCI format 1_0, DCI format 1_1, and/or DCI format2_3.

In some examples, if the UE is configured by higher layers to receive aPDCCH, a PDSCH and/or a CSI-RS in the set of symbols of the slot, theone or more operations may comprise receiving the PDCCH, the PDSCHand/or the CSI-RS if the UE does not detect a DCI format 0_0, DCI format0_1, DCI format 1_0, DCI format 1_1, and/or DCI format 2_3 thatindicates to the UE to transmit a PUSCH, a PUCCH, a PRACH and/or an SRSin the set of symbols of the slot. In some examples, if the UE isconfigured by higher layers to receive a PDCCH, a PDSCH and/or a CSI-RSin the set of symbols of the slot, the one or more operations maycomprise receiving the PDCCH, the PDSCH and/or the CSI-RS if the UEdetects a DCI format 0_0, DCI format 0_1, DCI format 1_0, DCI format1_1, and/or DCI format 2_3 that indicates to the UE to transmit a PUSCH,a PUCCH, a PRACH and/or an SRS in the set of symbols of the slot and/orif a number of symbols between a last symbol of a control resource setwhere the UE detects the DCI format 0_0, DCI format 0_1, DCI format 1_0,DCI format 1_1, and/or DCI format 2_3 and a first symbol in the set ofsymbols is smaller than a PUSCH preparation time N₂ for a correspondingPUSCH timing capability.

Alternatively and/or additionally, the UE may not receive the PDCCH, thePDSCH and/or the CSI-RS in the set of symbols of the slot. In someexamples, the UE may transmit the PUSCH, the PUCCH, the PRACH and/or theSRS in the set of symbols of the slot if the UE is configured by higherlayers to transmit a periodic SRS, a PUCCH, a PUSCH and/or a PRACH inthe set of symbols in the slot, if the UE does not detect a DCI format1_0, DCI format 1_1 and/or DCI format 0_1 that indicates to the UE toreceive PDSCH and/or CSI-RS in the set of symbols in the slot and/or ifthe UE detects a DCI format 1_0, DCI format 1_1 and/or DCI format 0_1that indicates to the UE to receive PDSCH or CSI-RS in the set ofsymbols in the slot and a number of symbols between a last symbol of acontrol resource set where the UE detects the DCI format 1_0 and/or DCIformat 1_1 and a first symbol in the set of symbols is smaller than thePUSCH preparation time N₂ for the corresponding PUSCH timing capability.Alternatively and/or additionally, the UE does not transmit the periodicSRS, the PUCCH, the PUSCH and/or the PRACH in the set of symbols of theslot.

In some examples, the PUSCH preparation time N₂ is defined with respectto a subcarrier spacing of the PDCCH providing a corresponding DCIformat. In some examples, for a set of symbols of a slot that areindicated to a UE as uplink by higher layer parameterstdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationCommon2 and/ortdd-UL-DL-ConfigDedicated, when provided to the UE, the UE may notreceive PDCCH, PDSCH and/or CSI-RS in the set of symbols of the slot.

In some examples, for a set of symbols of a slot that are indicated to aUE as downlink by higher layer parameters tdd-UL-DL-ConfigurationCommon,tdd-UL-DL-ConfigurationCommon2, and/or tdd-UL-DL-ConfigDedicated, whenprovided to the UE, the UE may not transmit PUSCH, PUCCH, PRACH, and/orSRS in the set of symbols of the slot.

In some examples, for a set of symbols of a slot that are indicated to aUE as flexible by higher layer parameters tdd-UL-DL-ConfigurationCommon,tdd-UL-DL-ConfigurationCommon2, and/or tdd-UL-DL-ConfigDedicated, whenprovided to the UE, the UE does not expect to receive both dedicatedhigher layer parameters configuring transmission from the UE in the setof symbols of the slot and dedicated higher layer parameters configuringreception by the UE in the set of symbols of the slot.

In some examples, if a UE is configured by higher layers with aparameter SlotFormatIndicator, the UE is provided with a Slot FormatIndication Radio Network Temporary Identifier (SFI-RNTI) by higher layerparameter sfi-RNTI and/or with a payload size of DCI format 2_0 by ahigher layer parameter dci-PayloadSize. In some examples, the UE isprovided, in one or more serving cells, with a configuration for asearch space set s and/or a corresponding control resource set p formonitoring M_(p,s) ^(LSFI) PDCCH candidates for DCI format 2_0 with aCCE aggregation level of L_(SFI) CCEs. In some examples, the M_(p,s)^(LSFI) PDCCH candidates are the first PDCCH candidates for CCEaggregation level L_(SFI) for search space set s in control resource setp.

In some examples, for each serving cell in the set of serving cells, theUE is provided with one or more of the following: an identity of theserving cell by higher layer parameter servingCellId; a location of anSFI-index field in DCI format 2_0 by higher layer parameterpositionInDCI; a set of slot format combinations by higher layerparameter slotFormatCombinations, where each slot format combination inthe set of slot format combinations comprises one or more slot formatsindicated by a higher layer parameter slotFormats for the slot formatcombination and/or a mapping for the slot format combination provided byslotFormats to a corresponding SFI-index field value in DCI format 2_0provided by higher layer parameter slotFormatCombinationId; for unpairedspectrum operation, a reference subcarrier spacing μ_(SFI) by higherlayer parameter subcarrierSpacing and/or, when a supplementary uplinkcarrier is configured for the serving cell, a reference subcarrierspacing μ_(SFI,SUL) by higher layer parameter subcarrierSpacing2 for thesupplementary uplink carrier; for paired spectrum operation, a referencesubcarrier spacing μ_(SFI,DL) for a downlink BWP by higher layerparameter subcarrierSpacing and/or a reference subcarrier spacingμ_(SFI,UL) for an uplink BWP by higher layer parametersubcarrierSpacing2.

An SFI-index field value in a DCI format 2_0 indicates, to a UE, a slotformat for each slot of a number of slots for each downlink BWP and/oreach uplink BWP starting from a slot where the UE detects the DCI format2_0. In some examples, the number of slots is greater than or equal to aPDCCH monitoring periodicity for DCI format 2_0. In some examples, theSFI-index field includes log₂(maxSFIindex) bits, where maxSFIindex is amaximum value of values provided by a corresponding higher layerparameter slotFormatCombinationId.

FIGS. 5A-5B illustrate a table associated with slot formats in a normalCyclic Prefix (CP). FIG. 5A illustrates a first portion 500 of the tableand FIG. 5B illustrates a second portion 550 of the table. In someexamples, symbols in a slot can be classified as ‘downlink’ (denoted ‘D’in the table), ‘flexible’ (denoted ‘X’ in the table) and/or ‘uplink’(denoted ‘U’ in the table).

In some examples, if a PDCCH monitoring periodicity for DCI format 2_0,provided to a UE for the search space set s by higher layer parametermonitoringSlotPeriodicityAndOffset, is smaller than a duration of a slotformat combination the UE obtains at a PDCCH monitoring occasion for DCIformat 2_0 by a corresponding SFI-index field value, and the UE detectsmore than one DCI formats 2_0 indicating a slot format for a slot, theUE expects each of the more than one DCI formats 2_0 to indicate a sameformat for the slot. In some examples, a UE does not expect to beconfigured to monitor PDCCH for DCI format 2_0 on a second serving cellthat uses larger subcarrier spacing than the serving cell.

In some examples, for unpaired spectrum operation for a UE on a servingcell, the UE is provided with, via higher layer parametersubcarrierSpacing, a reference subcarrier spacing configuration ofμ_(SFI) for each slot format in a combination of slot formats indicatedby an SFI-index field in DCI format 2_0. In some examples, the UEexpects that for a reference subcarrier spacing configuration of μ_(SFI)and/or for an active downlink BWP and uplink BWP pair with subcarrierspacing configuration of μ, μ>μ_(SFI) is true. In some examples, eachslot format in the combination of slot formats indicated by theSFI-index field in DCI format 2_0 is applicable to 2^((μ-μ) ^(SFI) ⁾consecutive slots in the active downlink BWP and uplink BWP pair wherethe first slot starts at a same time as a first slot for the referencesubcarrier spacing configuration of μ_(SFI) and each downlink, flexibleor uplink symbol for the reference subcarrier spacing configuration ofμ_(SFI) corresponds to 2^((μ-μ) ^(SFI) ⁾ consecutive downlink, flexibleor uplink symbols for the subcarrier spacing configuration μ.

In some examples, for paired spectrum operation for a UE on a servingcell, the SFI-index field in DCI format 2_0 indicates a combination ofslot formats that includes a combination of slot formats for a referencedownlink BWP and a combination of slot formats for a reference uplinkBWP of the serving cell. In some examples, the UE may be provided with,via higher layer parameter subcarrierSpacing, a reference subcarrierspacing configuration of μ_(SFI,DL) for the combination of slot formatsindicated by the SFI-index field in DCI format 2_0 for the referencedownlink BWP of the serving cell. In some examples, the UE may beprovided with, via higher layer parameter subcarrierSpacing2, areference subcarrier spacing configuration of μ_(SFI,UL) for thecombination of slot formats indicated by the SFI-index field in DCIformat 2_0 for the reference uplink BWP of the serving cell. Ifμ_(SFI,DL)≥μ_(SFI,UL) for each 2^((μ) ^(SFI,DL) ^(−μ) ^(SFI,UL) ⁾+1values provided by a value of higher layer parameter slotFormats, thefirst 2^((μ) ^(SFI,DL) ^(−μ) ^(SFI,UL) ⁾ values for the combination ofslot formats are applicable to the reference downlink BWP and the nextvalue is applicable to the reference uplink BWP. The value of higherlayer parameter slotFormats may be determined by a value ofslotFormatCombinationId in slotFormatCombination and the value ofslotFormatCombinationId is set by the value of the SFI-index field valuein DCI format 2_0. If μ_(SFI,DL)<μ_(SFI,UL) for each 2^((μ) ^(SFI,UL)^(−μ) ^(SFI,DL) ⁾+1 values provided by higher layer parameterslotFormats, the first value for the combination of slot formats isapplicable to the reference downlink BWP and the next 2^((μ) ^(SFI,UL)^(−μ) ^(SFI,DL) ⁾ values are applicable to the reference uplink BWP.

In some examples, the UE is provided with a reference subcarrier spacingconfiguration of μ_(SFI,DL) such that for an active downlink BWP withsubcarrier spacing configuration of μ_(DL), μ_(DL)≥μ_(SFI,DL) is true.In some examples, the UE is provided with a reference subcarrier spacingconfiguration of μ_(SFI,UL) such that for an active uplink BWP withsubcarrier spacing configuration of μ_(UL), μ_(UL)≥μ_(SFI,UL) is true.In some examples, each slot format for a combination of slot formatsindicated by the SFI-index field in DCI format 2_0 for the referencedownlink BWP, by indicating a value for slotFormatCombinationId that ismapped to a value of slotFormats in slotFormatCombination, is applicableto 2^((μ) ^(DL) ^(−μ) ^(SFI,DL) ⁾ consecutive slots for the activedownlink BWP where the first slot starts at a same time as a first slotin the reference downlink BWP and/or each downlink or flexible symbolfor the reference subcarrier spacing configuration of μ_(SFI,DL)corresponds to 2^((μ) ^(DL) ^(−μ) ^(SFI,DL) ⁾, consecutive downlink orflexible symbols for the subcarrier spacing configuration μ_(DL). Insome examples, each slot format for the combination of slot formats forthe reference uplink BWP is applicable to 2^((μ) ^(UL) ^(−μ) ^(SFI,UL) ⁾consecutive slots for the active uplink BWP where the first slot startsat a same time as a first slot in the reference uplink BWP and eachuplink or flexible symbol for the reference subcarrier spacingconfiguration of μ_(SFI,UL) corresponds to 2^((μ) ^(UL) ^(−μ) ^(SFI,UL)⁾ consecutive uplink or flexible symbols for the subcarrier spacingconfiguration μ_(UL).

In some examples, for unpaired spectrum operation with a second uplinkcarrier for a UE on a serving cell, the SFI-index field in DCI format2_0 indicates a combination of slot formats that includes a combinationof slot formats for a reference first uplink carrier of the serving celland a combination of slot formats for a reference second uplink carrierof the serving cell. In some examples, the UE is provided with, viahigher layer parameter subcarrierSpacing, a reference subcarrier spacingconfiguration of μ_(SFI) for the combination of slot formats indicatedby the SFI-index field in DCI format 2_0 for the reference first uplinkcarrier of the serving cell. In some examples, the UE is provided with,via higher layer parameter subcarrierSpacing2, a reference subcarrierspacing configuration of μ_(SFI,SUL) for the combination of slot formatsindicated by the SFI-index field in DCI format 2_0 for the referencesecond uplink carrier of the serving cell. In some examples, for each2^((μ) ^(SFI) ^(−μ) ^(SFI, SUL) )+1 values of higher layer parameterslotFormats, the first 2^((μ) ^(SFI) ^(−μ) ^(SFI, SUL) ⁾ values for thecombination of slot formats are applicable to the reference first uplinkcarrier and the next value is applicable to the reference second uplinkcarrier.

In some examples, the UE expects to be provided with a referencesubcarrier spacing configuration of μ_(SFI,SUL) such that for an activeuplink BWP in the second uplink carrier with subcarrier spacingconfiguration of μ_(SUL), μ_(SUL)≥μ_(SFI, SUL) is true. In someexamples, each slot format for a combination of slot formats indicatedby the SFI-index field in DCI format 2_0 for the reference first uplinkcarrier is applicable to 2^((μ-μ) ^(SFI) ⁾ consecutive slots for theactive downlink BWP and uplink BWP pair in the first uplink carrierwhere the first slot starts at a same time as a first slot in thereference first uplink carrier. In some examples, each slot format forthe combination of slot formats for the reference second uplink carrieris applicable to 2^((μ) ^(SUL) ^(−μ) ^(SFI, SUL) ⁾ consecutive slots forthe active uplink BWP in the second uplink carrier where the first slotstarts at a same time as a first slot in the reference second uplinkcarrier.

In some examples, if a BWP in the serving cell is configured with μ−2and/or with extended CP, the UE expects μ_(SFI)−1, μ_(SFI)−1 and/orμ_(SFI)−2. In some examples, a format for a slot with extended CP isdetermined based upon a format for a slot with normal CP. In someexamples, a UE determines that an extended CP symbol is a downlinksymbol if a normal CP symbol overlapping with the extended CP symbol isa downlink symbol. Alternatively and/or additionally, a UE determinesthat an extended CP symbol is an uplink symbol if a normal CP symboloverlapping with the extended CP symbol is an uplink symbol.Alternatively and/or additionally, a UE determines that an extended CPsymbol is a flexible symbol if a normal CP symbol overlapping with theextended CP symbol is a flexible symbol. In some examples, more than onenormal CP symbols overlap with an extended CP symbol. In some examples,a UE determines that the extended symbol is a flexible symbol if one ormore symbols of the more than one normal CP symbols are flexiblesymbols. Alternatively and/or additionally, a UE determines that theextended symbol is a flexible symbol if the more than one normal CPsymbols comprise both one or more downlink symbols and one or moreuplink symbols.

In some examples, a reference subcarrier spacing configuration ofμ_(SFI), μ_(SFI,DL), μ_(SFI,UL) and/or μ_(SFI,SUL) corresponds to 0, 1and/or 2 for frequency range 1. In some examples, a reference subcarrierspacing configuration of μ_(SFI), μ_(SFI,DL), μ_(SFI,UL) and/orμ_(SFI,SUL) corresponds to 2 and/or 3 for frequency range 2.

In some examples, for a set of symbols of a slot, a UE does not expectto detect a DCI format 2_0 with an SFI-index field value indicating thatthe set of symbols of the slot are uplink and to detect a DCI format1_0, a DCI format 1_1 and/or a DCI format 0_1 instructing the UE toreceive PDSCH and/or CSI-RS in the set of symbols of the slot.

In some examples, for a set of symbols of a slot, a UE does not expectto detect a DCI format 2_0 with an SFI-index field value indicating thatthe set of symbols in the slot are downlink and to detect a DCI format0_0, a DCI format 0_1, a DCI format 1_0, a DCI format 1_1 and/or a DCIformat 2_3 instructing the UE to transmit PUSCH, PUCCH, PRACH and/or SRSin the set of symbols of the slot.

In some examples, for a set of symbols of a slot that are indicated tobe downlink by higher layer parameters tdd-UL-DL-ConfigurationCommon,tdd-UL-DL-ConfigurationCommon2 and/or tdd-UL-DL-ConfigDedicated, whenprovided to a UE, the UE does not expect to detect a DCI format 2_0 withan SFI-index field value indicating that the set of symbols of the slotare uplink and/or flexible.

In some examples, for a set of symbols of a slot that are indicated tobe uplink by higher layer parameters tdd-UL-DL-ConfigurationCommon,tdd-UL-DL-ConfigurationCommon2 and/or tdd-UL-DL-ConfigDedicated, whenprovided to a UE, the UE does not expect to detect a DCI format 2_0 withan SFI-index field value indicating that the set of symbols of the slotare downlink and/or flexible.

In some examples, for a set of symbols of a slot, a condition is met ifthe set of symbols are indicated to a UE to be flexible by higher layerparameters tdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationCommon2and/or tdd-UL-DL-ConfigDedicated, when provided to the UE. Alternativelyand/or additionally, the condition is met if higher layer parameterstdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationCommon2 and/ortdd-UL-DL-ConfigDedicated are not provided to the UE and if the UEdetects a DCI format 2_0 providing a format for the slot using a slotformat value other than 255.

In some examples, if the condition is met and/or if one or more symbolsfrom the set of symbols are symbols in a control resource set configuredto the UE for PDCCH monitoring, the UE receives PDCCH in the controlresource set if an SFI-index field value in DCI format 2_0 indicatesthat the one or more symbols are downlink symbols.

In some examples, if the condition is met and/or if an SFI-index fieldvalue in DCI format 2_0 indicates that the set of symbols of the slotare flexible and the UE detects a DCI format 1_0, DCI format 1_1 and/orDCI format 0_1 instructing the UE to receive PDSCH and/or CSI-RS in theset of symbols of the slot, the UE receives the PDSCH and/or the CSI-RSin the set of symbols of the slot.

In some examples, if the condition is met and/or if an SFI-index fieldvalue in DCI format 2_0 indicates that the set of symbols of the slotare flexible and the UE detects a DCI format 0_0, DCI format 0_1, DCIformat 1_0, DCI format 1_1, or DCI format 2_3 instructing the UE totransmit PUSCH, PUCCH, PRACH and/or SRS in the set of symbols of theslot, the UE transmits the PUSCH, the PUCCH, the PRACH and/or the SRS inthe set of symbols of the slot.

In some examples, the UE does not transmit or receive in the set ofsymbols of the slot if the condition is met, if an SFI-index field valuein DCI format 2_0 indicates that the set of symbols of the slot areflexible, if the UE does not detect a DCI format 1_0, DCI format 1_1and/or DCI format 0_1 instructing the UE to receive PDSCH and/or CSI-RSand/or if the UE does not detect a DCI format 0_0, a DCI format 0_1, aDCI format 1_0, a DCI format 1_1 and/or a DCI format 2_3 instructing theUE to transmit PUSCH, PUCCH, PRACH and/or SRS in the set of symbols ofthe slot.

In some examples, if the condition is met and/or if the UE is configuredby higher layers to receive PDSCH and/or CSI-RS in the set of symbols ofthe slot, the UE receives the PDSCH and/or the CSI-RS in the set ofsymbols of the slot merely if an SFI-index field value in DCI format 2_0indicates that the set of symbols of the slot are downlink.

In some examples, if the condition is met and/or if the UE is configuredby higher layers to transmit PUCCH, PUSCH and/or PRACH in the set ofsymbols of the slot, the UE transmits the PUCCH, the PUSCH and/or thePRACH in the slot merely if an SFI-index field value in DCI format 2_0indicates that the set of symbols of the slot are uplink.

In some examples, if the condition is met and/or if the UE is configuredby higher layers to transmit periodic SRS in the set of symbols of theslot, the UE transmits the periodic SRS merely in a subset of symbols ofthe set of symbols of the slot that are indicated to be uplink symbolsby an SFI-index field value in DCI format 2_0.

In some examples, if the condition is met, the UE does not expect todetect an SFI-index field value in DCI format 2_0 indicating that theset of symbols of the slot are downlink and also detect DCI format 0_0,DCI format 0_1, DCI format 1_0, DCI format 1_1 and/or DCI format 2_3instructing the UE to transmit SRS, PUSCH, PUCCH and/or PRACH in one ormore symbols of the set of symbols of the slot.

In some examples, if the condition is met, the UE does not expect todetect an SFI-index field value in DCI format 2_0 indicating that theset of symbols of the slot are downlink if the set of symbols of theslot includes symbols corresponding to a first repetition of a PUSCHtransmission activated by an uplink Type 2 grant PDCCH.

In some examples, if the condition is met, the UE does not expect todetect an SFI-index field value in DCI format 2_0 indicating that theset of symbols of the slot are uplink and also detect DCI format 1_0,DCI format 1_1 and/or DCI format 0_1 instructing the UE to receive PDSCHand/or CSI-RS in one or more symbols of the set of symbols of the slot.

In some examples, if a UE is configured by higher layers to receive aCSI-RS and/or a PDSCH in a set of symbols of a slot and the UE detects aDCI format 2_0 with a slot format value other than 255 that indicates aslot format with a subset of symbols from the set of symbols as uplinkand/or flexible, or the UE detects DCI format 0_0, DCI format 0_1, DCIformat 1_0, DCI format 1_1 and/or DCI format 2_3 instructing the UE totransmit PUSCH, PUCCH, SRS and/or PRACH in at least one symbol of theset of the symbols, the UE cancels reception of the CSI-RS and/or thePDSCH in the set of symbols of the slot.

In some examples, if a UE is configured by higher layers to transmitperiodic SRS, PUCCH, PUSCH and/or PRACH in a set of symbols of a slotand the UE detects a DCI format 2_0 with a slot format value other than255 that indicates a slot format with a subset of symbols from the setof symbols as downlink and/or flexible and/or the UE detects a DCIformat 1_0, DCI format 1_1 and/or DCI format 0_1 instructing the UE toreceive CSI-RS and/or PDSCH in at least one symbol of the set ofsymbols, then the UE does not expect to cancel the transmission insymbols from the subset of symbols that occur, relative to a last symbolof a control resource set where the UE detects the DCI format 2_0, aftera number of symbols that is smaller than a PUSCH preparation time N₂ forthe corresponding PUSCH timing capability and/or the UE may cancel thetransmission in remaining symbols of the slot. In some examples, thePUSCH preparation time N₂ is defined with respect to a subcarrierspacing of a PDCCH providing DCI format 2_0.

In some examples, a UE assumes that flexible symbols in a controlresource set configured to the UE for PDCCH monitoring are downlinksymbols if the UE does not detect an SFI-index field value in DCI format2_0 indicating that the set of symbols of the slot are flexible and/oruplink and the UE does not detect DCI format 0_0, DCI format 0_1, DCIformat 1_0, DCI format 1_1 and/or DCI format 2_3 instructing the UE totransmit SRS, PUSCH, PUCCH and/or PRACH in the set of symbols.

For a set of symbols of a slot that are indicated as flexible by higherlayer parameters tdd-UL-DL-ConfigurationCommon,tdd-UL-DL-ConfigurationCommon2 and/or tdd-UL-DL-ConfigDedicated, whenprovided to a UE, and/or when higher layer parameterstdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationCommon2 and/ortdd-UL-DL-ConfigDedicated are not provided to the UE, and/or if the UEdoes not detect a DCI format 2_0 providing a format for the slot, the UEmay receive PDSCH and/or CSI-RS in the set of symbols of the slot if theUE receives a corresponding indication by DCI format 1_0, DCI format 1_1and/or DCI format 0_1. Alternatively and/or additionally, the UE maytransmit PUSCH, PUCCH, PRACH and/or SRS in the set of symbols of theslot if the UE receives a corresponding indication by DCI format 0_0,DCI format 0_1, DCI format 1_0, DCI format 1_1 and/or DCI format 2_3.Alternatively and/or additionally, the UE may receive PDCCH.Alternatively and/or additionally, if the UE is configured by higherlayers to receive PDSCH and/or CSI-RS in the set of symbols of the slot,the UE may not receive the PDSCH and/or the CSI-RS in the set of symbolsof the slot. Alternatively and/or additionally, if the UE is configuredby higher layers to transmit periodic SRS, PUCCH, PUSCH and/or PRACH inthe set of symbols of the slot, the UE may not transmit the PUCCH, thePUSCH and/or the PRACH in the slot and/or may not transmit the periodicSRS in symbols of the set of symbols in the slot, starting from a symbolthat is a number of symbols equal to the PUSCH preparation time N₂ forthe corresponding PUSCH timing capability after a last symbol of acontrol resource set where the UE is configured to monitor PDCCH for DCIformat 2_0 and/or the UE is not expected to cancel transmission of theperiodic SRS, the PUCCH, the PUSCH and/or the PRACH in symbols of theset of symbols in the slot, starting before a symbol that is a number ofsymbols equal to the PUSCH preparation time N₂ for the correspondingPUSCH timing capability after a last symbol of a control resource setwhere the UE is configured to monitor PDCCH for DCI format 2_0.

3GPP TS 38.211 V15.2.0 provides information associated with NR framestructure, channels and/or numerology design. In some examples, sizes ofvarious fields in the time domain may be expressed in time units (e.g.,T_(c)=1/(Δf_(max)·N_(f)), where Δf_(max)=480·10³ Hz and N_(f)=4096). Insome examples, for a constant, κ=T_(s)/T_(c)=64 is true, whereT_(s)=1/(Δf_(ref)·N_(f,ref)), Δf_(ref)=15·10³ Hz and N_(f,ref)=2048.

FIG. 6A illustrates a table 600 associated with OFDM numerologies. Forexample, where μ and a CP for a BWP may be obtained from higher-layerparameters subcarrierSpacing and cyclicPrefix, respectively.

Downlink transmissions and/or uplink transmissions may be organized intoframes with T_(f)=(Δf_(max)N_(f)/100)·T_(c)=10 ms duration, eachconsisting of ten subframes (and/or a different number of subframes) ofT_(sf)=(Δf_(max)N_(f)/1000)·T_(c)=1 ms duration. A number of consecutiveOFDM symbols per subframe may be subframe, N_(symb)^(subframe,μ)=N_(symb) ^(slot)N_(slot) ^(subframe,μ). Each frame may bedivided into two equally-sized half-frames of five subframes each withhalf-frame 0 consisting of subframes 0-4 and half-frame 1 consisting ofsubframes 5-9. There may be one set of frames in the uplink and/or oneset of frames in the downlink on a carrier.

FIG. 6B illustrates a table 650 associated with a number of OFDM symbolsper slot, a number of slots per frame and a number of slots per subframefor a normal CP. For subcarrier spacing configuration μ, slots may benumbered n_(s) ^(μ)∈{0, . . . , N_(slot) ^(subframe,μ)−1} in increasingorder within a subframe and n_(s,f) ^(μ)∈{0, . . . , N_(slot)^(subframe,μ)−1} in increasing order within a frame. There may beN_(symb) ^(slot) consecutive OFDM symbols in a slot where N_(symb)^(slot) depends on the CP associated with the table 650. The start ofslot n_(s) ^(μ) in a subframe is aligned in time with the start of OFDMsymbol n_(s) ^(μ) N_(symb) ^(slot) in the same subframe.

In a slot in a downlink frame, a UE shall assume that downlinktransmissions occur in ‘downlink’ and/or ‘flexible’ symbols. In a slotin an uplink frame, the UE shall only transmit in ‘uplink’ and/or‘flexible’ symbols.

In some examples, a UE that is not capable of full-duplex communicationis not expected to transmit in the uplink earlier than N_(Rx-Tx)T_(c)after the end of the last received downlink symbol in the same cell.

Final Report of 3GPP TSG RAN WG1 #92 v1.0.0 provides that additionalfunctionalities may be required for operation in licensed spectrum inthe following deployment scenarios: carrier aggregation between licensedband NR Primary Cell (PCell) and NR-unlicensed (NR-U) Secondary Cell(SCell), where NR-U SCell may have both downlink and uplink capabilitiesor may merely have downlink capabilities; dual connectivity betweenlicensed band LTE PCell and NR-U PSCell; stand-alone NR-U, an NR cellwith downlink in unlicensed band and uplink in licensed band; dualconnectivity between licensed band NR PCell and NR-U PSCell.

Draft Report of 3GPP TSG RAN WG1 #93 v0.2.0 provides that single andmultiple downlink to uplink and uplink to downlink switching within ashared Next Generation NodeB (gNB) Channel Occupancy Time (COT) may bebeneficial and can be supported. Listen-Before-Talk (LBT) requirementsfor supporting single and/or multiple switching points include one ormore of the following: for a gap of less than 16 microseconds (μs),no-LBT is used where restrictions and/or conditions on when no-LBT isused may be identified considering fair coexistence; for a gap of above16 μs that does not exceed 25 μs, one-shot LBT is used whererestrictions and/or conditions on when one-shot LBT is used may beidentified considering fair coexistence; for a single switching point,where a gap from downlink transmission to uplink transmission exceeds 25μs, one-shot LBT is used, where an allowed number of one-shot LBTattempts for granted uplink transmission is not defined; for multipleswitching points where a gap from downlink transmission to uplinktransmission exceeds 25 μs, one-shot LBT is used.

Draft Report of 3GPP TSG RAN WG1 #93 v0.2.0 provides that benefits ofusing a signal that facilitates the signal's detection with lowcomplexity may be investigated in association with one or more of thefollowing scenarios: UE power saving; improved coexistence; spatialreuse at least within the same operator network; serving celltransmission burst acquisition.

Draft Report of 3GPP TSG RAN WG1 #93 v0.2.0 provides that NR-U shouldhave a signal that contains at least SS/PBCH block burst settransmission and/or other channels and/or signals transmitted togetheras part of the signal. Draft Report of 3GPP TSG RAN WG1 #93 v0.2.0provides that a design of the signal should consider one or more of thefollowing characteristics associated with unlicensed band operation:there are no (or minimal) gaps within a time pan the signal istransmitted within a beam; whether gaps are needed for beam switchingand/or, if gaps are needed for beam switching, durations of the gaps; anoccupied channel bandwidth is satisfied (or is not satisfied);minimizing COT of the signal; fast channel access.

3GPP TS 38.331 V15.2.0 provides information associated with informationelements. FIG. 7A illustrates an exemplary TDD-UL-DL-Config informationelement 700. In some examples, TDD-UL-DL-Config information elements areused for determining uplink Time Division Duplex (TDD) configurationand/or downlink TDD configuration. In some examples, TDD-UL-DL-Configinformation elements are UE-specific. In some examples, TDD-UL-DL-Configinformation elements are cell specific. In some examples, aTDD-UL-DL-Config information element comprises areferenceSubcarrierSpacing field indicative of a reference subcarrierspacing used to determine time domain boundaries in an uplink-downlinkpattern which is common across subcarrier specific carriers (e.g.,independent of subcarrier spacing used for data transmission). In someexamples, merely values of 15 kHz, 30 kHz and/or 60 kHz (for <6 GHz)and/or values of 60 kHz and/or 120 kHz (for <6 GHz) may be applicable.In some examples, a network configures a reference subcarrier spacingthat is not larger than a subcarrier spacing of configured BWPs for aserving cell.

FIG. 7B illustrates an exemplary SlotFormatCombinationsPerCellinformation element 725. In some examples, aSlotFormatCombinationsPerCell information element is used forconfiguring SlotFormatCombinations applicable for a serving cell. Insome examples, a SlotFormatCombinationsPerCell information elementcorresponds to an L1 parameter ‘cell-to-SFI’.

In some examples, a SlotFormatCombination information element comprisesa slotFormatCombinationId field comprising an ID used in a DCI payloadto dynamically select a SlotFormatCombination (e.g., theslotFormatCombinationId field corresponds to L1 parameter ‘SFI-index’)and/or a slotFormats field indicative of slot formats that occur inconsecutive slots in time domain order.

In some examples, a SlotFormatCombinationsPerCell information elementcomprises a positionInDU field indicative of a (starting) position(e.g., bit) of the slotFormatCombinationId field (e.g., an SFI-Index)for a serving cell (e.g., servingCellId) within the DCI payload (e.g.,the positionInDCI field corresponds to L1 parameter ‘SFI-values’), aservingCellId field indicative of an ID of a serving cell for whichSlotFormatCombinations are applicable, a slotFormatCombinations fieldcomprising a list with the SlotFormatCombinations where aSlotFormatCombination of the SlotFormatCombinations comprises one ormore SlotFormats and/or a total number of SlotFormats in the list doesnot exceed 512. The term “SFI” as used herein may correspond to a SlotFormat Indication and/or a Slot Format Indicator. In some examples, theSlotFormatCombinationsPerCell information element comprises thesubcarrierSpacing field indicative of a reference subcarrier spacing fora slot format combination. In some examples, a network configures avalue associated with the subcarrierSpacing field that is smaller thanor equal to one or more subcarrier spacings of configured BWPs of aserving cell that a command applies to. In some examples, the networkconfigures a value associated with the subcarrierSpacing field that issmaller than or equal to a subcarrier spacing of a serving cell whichthe UE monitors for SFI indications. In some examples, thesubcarrierSpacing field corresponds to L1 parameter ‘SFI-scs’.

FIG. 7C illustrates an exemplary SlotFormatIndicator information element750. In some examples, a SlotFormatIndicator information element is usedto configure monitoring a Group Common PDCCH (GC-PDCCH) for SFIs. Insome examples, a SlotFormatIndicator information element comprises adci-PayloadSize field indicative of a total length of a DCI payloadscrambled with SFI-RNTI (e.g., the dci-PayloadSize field corresponds toL1 parameter ‘SFI-DCI-payload-length’), an sfi-RNTI field indicative ofan RNTI used for SFI on a given cell (e.g., the sfi-RNTI fieldcorresponds to L1 parameter ‘SFI-RNTI’) and/or aslotFormatCombToAddModList field comprising a list ofSlotFormatCombinations for serving cells of the UE (e.g., theslotFormatCombToAddModList field corresponds to L1 parameter‘SFI-cell-to-SFI’).

R1-1806105 provides information associated with NR and NR-U operation.In LTE operation, Cell Specific Reference Signals (CRSs) are present indownlink subframes and/or can be used for detecting downlinktransmission in various LTE Licensed Assisted Access (LAA) scenarios. InNR, CRSs may not be used. Accordingly, CRSs may not be used fordetecting downlink transmission in NR-U. R1-1806105 proposes thefollowing options for detecting a downlink transmission in NR-U: PDCCHmonitoring, where it may be assumed that monitoring on a full searchspace and/or blind decodings (BDs) may not be possible and/or efficientwhen there are multiple starting positions and/or slots defined; PDCCHDemodulation Reference Signal (DMRS)-based detection which may requirethat a PDCCH DMRS is transmitted via an entire Control-Resource Set(CORESET) at least in the beginning of the downlink transmission;detection of a preamble at the beginning of the downlink transmission,where the preamble may be constructed from CSI-RS, Tracking ReferenceSignal (TRS), PSS and/or SSS.

NR licensed band operation supports both semi-static and dynamicconfiguration for SFI. R1-1806105 proposes that it may be beneficial forthe following to be supported for NR-U: using semi-statically configuredresources for discovery reference signal and/or PRACH resources;conveying dynamic indication of time-varying COT structure usingGC-PDCCH. R1-1806105 proposes that dynamic indication of a COT structuremay result in the following benefits: enabling usage of Type 2 LBT atthe UE; GC-PDCCH can be used to determine a location of a short PUCCH atthe beginning of an uplink portion of a COT; providing opportunities forUE power saving, such as no PDCCH monitoring during an uplink portion ofthe COT; the dynamic indication of the COT structure can be used to aidCSI measurement at the UE; the dynamic indication of the COT structurecan be used to detect (and/or validate) downlink transmission detection.R1-1806105 proposes to use NR-U specific GC-PDCCH for dynamic indicationof the COT structure. R1-1806105 proposes that GC-PDCCH for SFI definedin NR-Rel-15 may be used as a starting point for further development.

3GPP TS 36.213 V15.1.0 provides information associated with DCI formats.FIG. 8A illustrates a table 800 comprising DCI formats that aresupported. The table 800 presents usages of the DCI formats. In someexamples, fields defined in the DCI formats are mapped to informationbits a₀ to a_(A-1). In some examples, a field is mapped in the order inwhich it appears, including one or more zero-padding bits, if any, witha first field mapped to a lowest order information bit a₀ and eachsuccessive field mapped to higher order information bits. In someexamples, the most significant bit of each field is mapped to a lowestorder information bit for that field (e.g., the most significant bit ofthe first field is mapped to a₀).

In some examples, if a number of information bits in a DCI format isless than 12 bits, zeros are appended to the DCI format until a payloadsize of the DCI format equals 12.

3GPP TS 37.213 V15.0.0 provides information associated with channelaccess procedure. An eNB operating one or more LAA SCells may performchannel access procedures for accessing one or more channels on whichone or more transmissions of the one or more LAA SCells are performed.

An eNB may transmit a transmission comprising PDSCH, PDCCH and/orEnhanced Physical Downlink Control Channel (EPDCCH) on a carrier onwhich one or more transmissions of one or more LAA SCells are performed,after first sensing a channel to be idle during slot durations of adefer duration T_(d); and after a counter N is zero in step 4 below. Thecounter N is adjusted by sensing the channel for one or more additionalslot durations according to the steps below.

In some examples, CW_(p) corresponds to a contention window for a givenpriority class. In some examples, CW_(max,p) corresponds to a maximumcontention window for a given priority class. In some examples,CW_(min,p) corresponds to a minimum contention window for a givenpriority class. In some examples, T_(mcot,p) corresponds to a maximumCOT for a given priority class.

At step 1, set N=N_(init), where N_(init) is a random number uniformlydistributed between 0 and CW_(p), and go to step 4. At step 2, if N>0and the eNB chooses to decrement the counter, set N=N−1. At step 3,sense the channel for an additional slot duration, and if the additionalslot duration is idle, go to step 4; if the additional slot duration isnot idle, go to step 5. At step 4, if N=0, stop; if N is not equal to 0,go to step 2. At step 5, sense the channel until either a busy slot isdetected within an additional defer duration T_(d) or slots (e.g., allslots) of the additional defer duration T_(d) are detected to be idle.At step 6, if the channel is sensed to be idle during all the slotdurations of the additional defer duration, go to step 4; else, go tostep 5.

If an eNB has not transmitted a transmission including PDSCH, PDCCHand/or EPDCCH on a carrier on which one or more transmissions of one ormore LAA SCells are performed after step 4 in the procedure above, theeNB may transmit a transmission including PDSCH, PDCCH and/or EPDCCH onthe carrier if the channel is sensed to be idle at least in a slotduration T_(sl) when the eNB is ready to transmit PDSCH, PDCCH and/orEPDCCH and if the channel has been sensed to be idle during slotdurations (and/or all slot durations) of a defer duration T_(d) beforethis transmission. If the channel has not been sensed to be idle in aslot duration T_(sl) when the eNB first senses the channel after it isready to transmit and/or if the channel has been sensed to be not idleduring one or more (and/or any) slot durations of a defer duration T_(d)before an intended transmission, the eNB proceeds to step 1 aftersensing the channel to be idle during the slot durations of a deferduration T_(d).

A defer duration T_(d) consists of duration T_(f)=16 μs followed by mconsecutive slot durations, where each slot duration is T_(sl)=9 μs, andT_(f) includes an idle slot duration T_(sl) at a start of T_(f). A slotduration T_(sl) is considered to be idle if the eNB senses a channelduring the slot duration, and the power detected by the eNB for at least4 μs within the slot duration is less than energy detection thresholdX_(Thresh). Otherwise, the slot duration T_(sl) may be considered to bebusy.

FIG. 8B illustrates a table 850 associated with channel access priorityclasses. CW_(p), where CW_(min,p)≤CW_(p)≤CW_(max,p), is a contentionwindow. CW_(p) (e.g., the contention window) may be adjusted. CW_(min,p)and/or CW_(max,p) may be chosen before step 1 of the procedure above.m_(p), C_(min,p) and/or C_(max,p) are based upon a channel accesspriority class associated with eNB transmission (as shown in the table850). X_(Thresh) may be adjusted. In some examples, if the eNB transmitsone or more discovery signal transmissions (not including PDSCH, PDCCHand/or EPDCCH) when N>0 (in the procedure above), the eNB may notdecrement N during one or more slot durations overlapping the one ormore discovery signal transmissions. Alternatively and/or additionally,the eNB may not continuously transmit on a carrier on which one or moretransmissions of one or more LAA SCells are performed, for a periodexceeding T_(mcot,p) (as shown in the table 850). Alternatively and/oradditionally, for p=3 and/or p=4, if an absence of any other technologysharing the carrier can be guaranteed on a long term basis (e.g., bylevel of regulation), T_(mcot,p)=10 ms. Alternatively and/oradditionally, T_(mcot,p)=8 ms.

In some examples, for LAA operation (e.g., LAA operation in one or moreregions, such as in Japan), if the eNB has transmitted a transmissionafter N=0 (in step 4 of the procedure above), the eNB may transmit anext continuous transmission, for a duration of maximum T_(j)=4 ms,after sensing a channel to be idle for at least a sensing interval ofT_(js)=34 μs and if the total sensing and transmission time is not morethan

${1000 \times T_{mcot}} + {{{\frac{T_{mcot}}{T_{j}} - 1}} \times T_{js}}$μs. T_(js) consists of duration T_(f)=16 μs followed by two slotdurations (e.g., T_(sl)=9 μs each) and T_(f) includes an idle slotduration T_(sl) at a start of T_(f). The channel is considered to beidle for T_(js) if it is sensed to be idle during the during slotdurations of T_(js).

In some examples, if a PUSCH transmission indicates COT sharing, an eNBmay transmit a transmission including PDCCH but not including PDSCH on acarrier (e.g., the carrier may be the same as a carrier used for thePUSCH transmission) after (e.g., immediately after) sensing a channel tobe idle for at least a sensing interval T_(pdcch)=25 μs, if the durationof the PDCCH is less than or equal to a length of two OFDM symbols. Insome examples, the transmission comprises an Autonomous Uplink DownlinkFeedback Indication (AUL-DFI) and/or an uplink grant to the UE fromwhich the PUSCH transmission indicating COT sharing was received. Insome examples, T_(pdcch) consists of a duration T_(f)=16 μs immediatelyfollowed by one slot duration T_(s)i=9 μs and/or T_(f) includes an idleslot duration T_(sl) at the start of T_(f). In some examples, thechannel is considered to be idle for T_(pdcch) if the channel is sensedto be idle during slot durations of T_(pdcch).

The term “base station” as used in the present disclosure corresponds toa network central unit and/or a network node in NR used to control oneor more Transmission/Reception Points (TRPs) associated with one or morecells. In some examples, communication between a base station and one ormore TRPs is performed via fronthaul. A base station may be referred toas a central unit, an eNB, a gNB and/or a NodeB.

The term “TRP” as used in the present disclosure corresponds to atransmission and reception point providing network coverage and/ordirectly communicating with UEs. A TRP may be referred to as adistributed unit and/or a network node.

The term “cell” as used in the present disclosure corresponds to a cellcomposed of one or more TRPs. In some examples, coverage of the cell iscomposed of coverage of the one or more TRPs (e.g., coverage of the cellis composed of coverage of all TRPs associated with the cell). In someexamples, the cell is controlled by a BS. In some examples, a cell maybe referred to as a TRP group (TRPG).

The term “DCI format 2_0” as used in the present disclosure may refer toan SFI related DCI.

In some examples, in LTE LAA, LTE Enhanced LAA (eLAA) and/or FurtherEnhanced LAA (FeLAA), a wireless node successfully performs a channelaccess procedure and/or an LBT scheme before initiating a transmission.In some examples, successfully performing a channel access procedureand/or an LBT scheme enables the wireless node to transmit for a timeperiod (e.g., a period of time). For example, after successfullyperforming the channel access procedure and/or the LBT scheme, thewireless node is allowed to transmit for the time period. In someexamples, the time period is based upon a traffic type associated withthe wireless node and/or transmission by the wireless node. In someexamples, the time period is based upon a Maximum Channel Occupancy Time(MCOT). In some examples, the MCOT corresponds to a maximum length limit(and/or a maximum time limit) for transmission by the wireless node(e.g., the wireless node may be allowed to perform a transmission duringa time period associated with the MCOT). In some examples, the MCOT isassociated with the traffic type. In some examples, after successfullyperforming the channel access procedure and/or the LBT scheme, thewireless node performs one or more transmissions during a COT (e.g., theone or more transmissions performed during the COT may be similar tolicensed band operation). In some examples, the COT corresponds to aportion of the MCOT. In some examples, a duration of the COT is lessthan or equal to a duration of the MCOT.

In some examples, a network node associated with NR-U indicates, viasemi-static signaling and/or dynamic signaling, one or more slot formatsand/or one or more transmission directions (e.g., uplink, downlinkand/or flexible) of one or more slots and/or one or more OFDM symbols.In some examples, the dynamic signaling is a group common signalingand/or a unicast signaling. In some examples, the dynamic signalingcorresponds to a DCI format 2_0.

However, in NR-U operation, instances occur where a base station (e.g.,a gNB) indicates one or more slot formats of one or more slots, via aDCI format 2_0, where the one or more slots are not aligned with a COTof a network or a base station. In some examples, the one or more slotsbeing aligned with the COT of the network corresponds to an end of theone or more slots being aligned with the ending position of the COT ofthe network. For example, if the one or more slots are not aligned withthe COT of the network, a portion of a slot of the one or more slots maycorrespond to a time after the ending position of the COT.

In some examples, the base station may indicate one or more slot formatsof one or more slots (to a UE) outside the COT of the network. In someexamples, a reference subcarrier spacing configuration of μ_(SFI) byhigher layer parameter subcarrierSpacing may be used for deriving eachslot format in a combination of slot formats indicated by a SFI-indexfield value in DCI format 2_0. Each slot format in the combination ofslot formats indicated by the SFI-index field value in DCI format 2_0 isapplicable to 2^((μ-μ) ^(SFI) ⁾ consecutive slots in an active BWP.Accordingly, if a subcarrier spacing configuration of the active BWP(i.e., μ) is different from the reference subcarrier spacing (i.e.,μ_(SFI)), a state of one reference symbol indicated in a slot format(directly) corresponds to a number of state of actual symbols. Hence, itmay be difficult for the base station to indicate a slot format to bealigned with the ending OFDM symbol of the COT of the network and/oraligned with the ending slot of the COT of the network. In someexamples, if a UE receives a DCI format 2_0 indicative of one or moreslot formats for one or more slots with a length longer than the COT ofthe network, the UE may perform incorrect measurements and/or the UE mayconsume unnecessary power for reception of a signal outside the COT ofthe network.

In some examples, a UE detects a COT. In some examples, one or more slotformats of one or more slots associated with the COT may be indicated bya DCI format 2_0 (e.g., the one or more slots may be within and/oraligned with the COT). In some examples, the DCI format 2_0 is receivedbefore the COT. Alternatively and/or additionally, the DCI format 2_0may be received within a second COT, before the COT. In some examples,the DCI format 2_0 is indicative of the one or more slot formats of theone or more slots associated with the COT. In existing systems, UEoperations (to be performed by the UE) in association with the one ormore slots associated with the COT are not defined. In existing systems,interpretation of the one or more slots by the UE is not defined.Further, in existing systems, UE operations to be performed by a UE,based upon a dynamic signaling indicative of one or more slot formats ofone or more slots outside a COT, are not defined.

Various techniques are provided herein for a UE to determine slotformats of slots.

In some examples, a UE receives an SFI for a serving cell. In someexamples, the SFI is indicative of one or more slot formats, one or moretransmission directions (e.g., uplink, downlink and/or flexible) and/orone or more functionalities of one or more slots of the serving cell. Insome examples, the SFI is transmitted on an unlicensed cell. In someexamples, the serving cell operates and/or is located in an unlicensedspectrum. In some examples, the serving cell may be an unlicensed cell.In some examples, the SFI comprises a slot format combination indicativeof one or more slot format values for the serving cell.

In some examples, if a slot and/or an OFDM symbol of the serving cell,indicated by the SFI, is within a time period, the UE applies the SFI(and/or a portion of the SFI) for the slot and/or the OFDM symbol (e.g.,the UE may determine a transmission direction and/or a functionality ofthe slot and/or the OFDM symbol based upon the SFI and/or the portion ofthe SFI). In some examples, the time period may correspond to a COT ofthe serving cell. Alternatively and/or additionally, the UE may considerthat the time period is the COT of the serving cell.

In some examples, a slot and/or an OFDM symbol may be within a timeperiod if a time corresponding to the slot and/or the OFDM symbol iswithin the time period (e.g., the time corresponding to the slot and/orthe OFDM symbol is inside the time period and/or the time correspondingto the slot and/or the OFDM symbol overlaps with the time period).

In some examples, a slot and/or a OFDM symbol may be outside a timeperiod if the slot and/or the OFDM symbol is not within the time period(e.g., a time corresponding to the slot and/or the OFDM symbol is notwithin the time period, the time corresponding to the slot and/or theOFDM symbol is not inside the time period and/or the time correspondingto the slot and/or the OFDM symbol does not overlap with the timeperiod).

In some examples, if a slot and/or an OFDM symbol of the serving cell,indicated by the SFI, is within a time period, the UE determines (and/orconsiders and/or assumes) a slot format of the slot and/or the OFDMsymbol based upon the SFI (and/or a portion of the SFI) (e.g., the UEmay determine the slot format of the slot and/or the OFDM symbol basedupon the SFI and/or the portion of the SFI). In some examples, the timeperiod may correspond to a COT of the serving cell. Alternatively and/oradditionally, the UE may consider that the time period is the COT of theserving cell.

In some examples, if a slot and/or an OFDM symbol of the serving cell,indicated by the SFI, is outside a time period, the UE does not applythe SFI (and/or a portion of the SFI) for the slot and/or the OFDMsymbol (e.g., the UE may not determine a transmission direction and/or afunctionality of the slot and/or the OFDM symbol based upon the SFIand/or the portion of the SFI). In some examples, the time period maycorrespond to a COT of the serving cell. Alternatively and/oradditionally, the UE may consider that the time period is the COT of theserving cell.

In some examples, if a slot and/or an OFDM symbol of the serving cell,indicated by the SFI, is outside a time period, the UE performs one ormore actions (e.g., one or more behaviors). In some examples, the timeperiod may correspond to a COT of the serving cell. Alternatively and/oradditionally, the UE may consider that the time period is a COT.

In some examples, the one or more actions comprises the UE discardingthe SFI (e.g., the UE may discard the SFI responsive to determiningand/or considering that the slot and/or the OFDM symbol are not withinthe time period).

In some examples, the one or more actions comprises the UE ignoring theSFI (e.g., the UE may ignore the SFI responsive to determining and/orconsidering that the slot and/or the OFDM symbol are not within the timeperiod).

In some examples, the one or more actions comprises the UE discardingand/or ignoring one or more slot format values in the SFI (e.g., the UEmay discard and/or ignore the one or more slot format values in the SFIresponsive to determining and/or considering that the slot and/or theOFDM symbol are not within the time period). In some examples, the oneor more slot format values correspond to the serving cell (e.g., the oneor more slot format values apply for the serving cell). In someexamples, the one or more slot format values are associated with one ormore slot formats of one or more slots and/or one or more OFDM symbolsoutside the time period. In some examples, the one or more slot formatvalues are indicative of the one or more slot formats of the one or moreslots and/or the one or more OFDM symbols outside the time period.

In some examples, the one or more actions comprises the UE storingand/or buffering the SFI until a next SFI monitoring occasion (e.g., anext available SFI monitoring occasion).

In some examples, the one or more actions comprises the UE storingand/or buffering the SFI until the UE receives a channel indicator or anindication of a channel occupancy.

In some examples, the one or more actions comprises the UE storingand/or buffering the SFI until the UE detects a channel occupancy.

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) if the UE receives a channelindicator that indicates the SFI is available. In some examples, the oneor more actions comprises the UE applying the SFI (that is stored and/orbuffered) responsive to the UE receiving the channel indicator thatindicates the SFI is available. In some examples, the UE does not applythe SFI for the serving cell before the UE receives the channelindicator.

In some examples, the UE determines (and/or considers and/or assumes)one or more slot formats of one or more slots within a COT based upon anSFI related DCI (e.g., a DCI format 2_0) received within a channeloccupancy.

In some examples, a channel indicator is used for indicating a channeloccupancy and/or a COT. In some examples, the channel indicator isindicative of the channel occupancy and/or the COT.

In some examples, an available SFI monitoring occasion corresponds to anSFI monitoring occasion within a COT.

Embodiment 1

In an embodiment, a UE receives an SFI for a serving cell in anunlicensed spectrum. In some examples, the SFI is indicative of one ormore slot formats, one or more transmission directions (e.g., uplink,downlink and/or flexible) and/or one or more functionalities of one ormore slots in the serving cell. In some examples, the SFI is indicativeof one or more transmission directions and/or one or morefunctionalities of one or more OFDM symbols in the serving cell. In someexamples, the serving cell may be an unlicensed cell.

In some examples, if a slot or an OFDM symbol of the serving cellindicated by the SFI is outside a time period (e.g. a COT of the servingcell, a COT from the UE's view), the UE may sense/detect a channelindicator or a channel occupancy on the slot or on the OFDM symbol.

In some examples, before or until the UE receives and/or detects achannel indicator for the serving cell, the UE assumes that one or moreslot formats, one or more transmission directions and/or one or morefunctionalities of one or more slots and/or one or more OFDM symbols isflexible. In some examples, the one or more slots and/or the one or moreOFDM symbols correspond to a time (and/or are identified) before the UEreceives and/or detects the channel indicator for the serving cell.

In some examples, the UE assumes that one or more slot formats, one ormore transmission directions and/or one or more functionalities of oneor more slots and/or one or more OFDM symbols is flexible, wherein oneor more slots and/or one or more OFDM symbols are located after the endof a COT of a network and/or the UE in the (unlicensed) serving cell anduntil the UE receives and/or detects a channel indicator for the servingcell.

In some examples, if a slot format value in the SFI is associated with aslot outside a time period, the UE does not perform configured physicalchannel reception and/or reference signal reception based upon the slotformat value. In some examples, if a slot format value in the SFI isassociated with a slot outside a time period, the UE does not performconfigured physical channel reception and/or reference signal receptionin the slot, based upon the slot format value.

In some examples, if a slot format value in the SFI is associated with aslot, for a subcarrier spacing in downlink active BWP, outside a timeperiod, the UE does not perform configured physical channel receptionand/or reference signal reception in the slot, based upon the slotformat value.

In some examples, a slot for a subcarrier spacing in downlink active BWPis a slot having a length that is determined based upon the subcarrierspacing in downlink active BWP.

In some examples, the UE does not perform configured physical channelreception and/or reference signal reception, based upon the SFI, in aflexible symbol outside of a time period.

In some examples, the UE does not perform configured physical channelreception and/or reference signal reception, based upon the SFI, in aflexible symbol outside of a time period, (except for performingmonitoring for a channel indicator for the serving cell). For example,the UE may monitor for the channel indicator for the serving cell in theflexible symbol outside of the time period.

In some examples, the UE does not perform configured physical channeltransmission and/or reference signal transmission, based upon the SFI,in a flexible symbol outside of a time period. In some examples, the UEdoes not perform configured physical channel reception and/or referencesignal reception, based upon the SFI, in a flexible symbol that is after(an end of) a COT from a network or the UE in the (unlicensed) servingcell and before the UE receives and/or detects a channel indicator forthe serving cell, (except for performing monitoring for a channelindicator for the serving cell). In some examples, the flexible symbolcorresponds to a time that is after (the end of) the COT and/or beforethe UE receives and/or detects a channel indicator for the serving cell.

In some examples, the UE does not perform configured physical channeltransmission and/or reference signal transmission, based upon the SFI,in a flexible symbol that is after (an end of) a COT from a network orthe UE in the (unlicensed) serving cell and before the UE receivesand/or detects a channel indicator for the serving cell. In someexamples, the flexible symbol corresponds to a time that is after (theend of) the COT and/or before the UE receives and/or detects the channelindicator for the serving cell.

In some examples, if a slot and/or an OFDM symbol of the serving cell,indicated by the SFI, is outside a time period, the UE performs one ormore actions (e.g., one or more behaviors).

In some examples, the one or more actions comprises the UE discarding orignoring one or more slot format values in the SFI (e.g., the UE maydiscard the one or more slot format values in the SFI if the UEdetermines and/or considers that the slot and/or the OFDM symbol are notwithin the time period). In some examples, the one or more slot formatvalues are associated with the slot and/or the OFDM symbol.

In some examples, the one or more actions comprises the UE discarding orignoring one or more slot format values in the SFI (e.g., the UE maydiscard the one or more slot format values in the SFI if the UE does notreceive and/or detect a channel indicator). In some examples, the one ormore slot format values are associated with the slot and/or the OFDMsymbol.

In some examples, the one or more actions comprises the UE discardingand/or ignoring the SFI (e.g., the UE may discard the SFI responsive todetermining and/or considering that the slot and/or the OFDM symbol arenot within the time period).

In some examples, the one or more actions comprises the UE storingand/or buffering the SFI until a next SFI monitoring occasion (e.g., anext available SFI monitoring occasion).

In some examples, the one or more actions comprises the UE storingand/or buffering the SFI until the UE receives a channel indicator forthe serving cell.

In some examples, the one or more actions comprises the UE storingand/or buffering the SFI until the UE detects a channel occupancy forthe serving cell.

In some examples, the one or more actions comprises the UE storingand/or buffering the SFI until the UE receives an indication of achannel occupancy for the serving cell.

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) from a beginning of a second slotand/or a second OFDM symbol and/or the UE may continue to apply the SFI(for one or more other slots and/or one or more other OFDM symbols)after the second slot and/or the second OFDM symbol), wherein the UEreceives (from a network) a channel indicator for the serving cell inthe second slot and/or the second OFDM symbol.

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) from a beginning of a second slotand/or a second OFDM symbol and/or the UE may continue to apply the SFI(for one or more other slots and/or one or more other OFDM symbols)after the second slot and/or the second OFDM symbol), wherein the UEdetects a channel occupancy for the serving cell in the second slotand/or the second OFDM symbol.

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) from (a time during) a second slotand/or a second OFDM symbol and/or the UE may continue to apply the SFI(for one or more other slots and/or one or more other OFDM symbols)after (the time during) the second slot and/or the second OFDM symbol),wherein the UE detects a channel occupancy for the serving cell in thesecond slot and/or the second OFDM symbol.

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) from (a time during) a second slotand/or a second OFDM symbol and/or the UE may continue to apply the SFI(for one or more other slots and/or one or more other OFDM symbols)after (the time during) the second slot and/or the second OFDM symbol),wherein the UE receives (from a network) an indication of a channeloccupancy for the serving cell in the second slot and/or the second OFDMsymbol.

In some examples, the one or more actions are performed by the UE basedupon a channel indicator for the serving cell. For example, whether theUE applies the SFI (that is stored and/or buffered) may be determinedbased upon the channel indicator. Alternatively and/or additionally,whether the UE applies the SFI (that is stored and/or buffered) may bedetermined based upon the channel indicator if the channel indicator isreceived before (a time corresponding to) an end of a second slotassociated with (e.g., defined by) a last slot format value in the SFI.In some examples, “last slot format value” as used herein corresponds toa last slot format value in the SFI, with respect to an order of slotformat values in the SFI (e.g., the order of slot format values in theSFI may be associated with a time-order of slots that slot format valuesof the SFI are associated with). In some examples, “last slot” as usedherein corresponds to a last slot of a plurality of slots with respectto an order of slots of the plurality of slots (e.g., the last slotcorresponds to a time that is after one or more times of one or moreother slots of the plurality of slots).

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) if a channel indicator for theserving cell is received and/or detected before (a time correspondingto) an end of a second slot associated with (e.g., defined by) a lastslot format value in the SFI.

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) if a channel occupancy for theserving cell is detected and/or an indication of the channel occupancyis received from a network before (a time corresponding to) an end of asecond slot associated with (e.g., defined by) a last slot format valuein the SFI.

In some examples, if the UE stores and/or buffers the SFI, the UE mayassume (and/or determine and/or consider) that one or more slot formats,one or more transmission directions and/or one or more functionalitiesof one or more slots and/or one or more OFDM symbols are flexible.

In some examples, if the UE stores and/or buffers the SFI, the UE mayassume (and/or determine and/or consider) that one or more slot formats,one or more transmission directions and/or one or more functionalitiesof one or more slots and/or one or more OFDM symbols are flexible, wherethe one or more slots and/or the one or more OFDM symbols correspond toa time before the UE receives and/or detects a channel indicator for theserving cell (e.g., the one or more slots and/or the one or more OFDMsymbols may correspond to one or more times that are before a time thatthe UE receives and/or detects the channel indicator for the servingcell).

In some examples, if the UE stores and/or buffers the SFI, the UE doesnot perform configured physical channel reception and/or referencesignal reception on a second slot associated with (e.g., defined by) aslot format value in the SFI.

In some examples, if the UE stores and/or buffers the SFI, the UE doesnot perform configured physical channel reception and/or referencesignal reception, based upon the SFI, on a second slot outside the timeperiod.

In some examples, if the UE stores and/or buffers the SFI, the UE doesnot perform configured physical channel reception and/or referencesignal reception, based upon the SFI, on a second slot outside the timeperiod, except for monitoring for a channel indicator for the servingcell.

In some examples, the one or more actions comprises the UE not applyingthe SFI (that is stored and/or buffered) if a channel indicator for theserving cell is not received and/or detected and/or if a channeloccupancy for the serving cell is not detected and/or an indication ofthe channel occupancy is not received from a network before (a timecorresponding to) an end of a second slot associated with (e.g., definedby) a last slot format value in the SFI.

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) before (a time corresponding to) anend of a second slot associated with (e.g., defined by) a last slotformat value in the SFI, if a channel indicator for the serving cell isreceived and/or detected and/or if the channel indicator is indicatesthat the SFI is available.

In some examples, the one or more actions comprises the UE applying theSFI (that is stored and/or buffered) if a channel indicator for theserving cell is received and/or detected after receiving the SFI and/orbefore (a time corresponding to) an end of a second slot associated with(e.g., defined by) a last slot format value in the SFI and/or if thechannel indicator is indicates that the SFI is available.

In some examples, the UE performing the one or more actions comprisesthe UE not applying the SFI (that is stored and/or buffered) if achannel indicator for the serving cell is received and/or detectedbefore (a time corresponding to) an end of a second slot associated with(e.g., defined by) a last slot format value in the SFI and/or if thechannel indicator is indicates that the SFI is not available.

In some examples, the one or more actions comprises the UE not applyingthe SFI (that is stored and/or buffered), if a channel indicator for theserving cell is not received and/or detected after receiving the SFIand/or before (a time corresponding to) an end of a second slotassociated with (e.g., defined by) a last slot format value in the SFIand/or if the channel indicator is indicates that the SFI is notavailable.

In some examples or above mentioned examples, if there are multipleslots associated with (e.g., defined by) the last slot format value inthe SFI, the second slot may correspond to a last slot of the multipleslots.

In some examples, the UE does not apply the SFI for the serving cellbefore receiving a channel indicator for the serving cell.

In some examples, the UE does not apply slot format value 255 (and/or aslot format corresponding to the slot format value 255) for one or moreslots, in the serving cell, corresponding to one or more times beforethe UE receives a channel indicator for the serving cell.

In some examples, the UE applies slot format value 255 (and/or a slotformat corresponding to the slot format value 255) for one or moreslots, in the serving cell, corresponding to one or more times after theUE receives a channel indicator for the serving cell.

In some examples, the UE applies slot format value 255 (and/or a slotformat corresponding to the slot format value 255) for a slot in theserving cell if (and/or after) the UE receives a channel indicator forthe serving cell.

In some examples, if the UE does not apply the SFI (that is storedand/or buffered), the UE assumes that one or more slot formats, one ormore transmission directions and/or one or more functionalities of oneor more slots and/or one or more OFDM symbols is flexible. In someexamples, the one or more slots and/or the one or more OFDM symbolscorrespond to a time before the UE receives and/or detects a channelindicator for the serving cell. For example, the one or more slotsand/or the one or more OFDM symbols may correspond to one or more timesbefore (a time that) the UE receives and/or detects the channelindicator for the serving cell.

In some examples, if the UE does not apply a slot format value in theSFI (that is stored and/or buffered), the UE does not perform configuredphysical channel reception and/or reference signal reception on a slotassociated with (e.g., defined by) the slot format value.

In some examples, if the UE does not apply the SFI (that is storedand/or buffered), the UE does not perform configured physical channelreception and/or reference signal reception outside the time period(e.g., the UE may not perform configured physical channel receptionand/or reference signal reception on a flexible symbol corresponding toa time that is outside of the time period).

In some examples, if the UE does not apply the SFI (that is storedand/or buffered), the UE does not perform configured physical channelreception and/or reference signal reception outside the time period,except for monitoring for a channel indicator for the serving cell(e.g., the UE may monitor for the channel indicator for the serving celloutside the time period).

In some examples, the UE applying the SFI for a slot corresponds to theUE determining (and/or considering and/or assuming) a slot format of theslot based upon the SFI. For example, if the UE applies the SFI for aslot, the UE determines (and/or considers and/or assumes) a slot format(and/or a transmission direction and/or a functionality) of the slotbased upon the SFI.

In an example, an SFI related DCI (e.g., a DCI format 2_0) is indicativeof one or more slot formats for slot #n through slot #n+7 (e.g., if #nis 10, the SFI related DCI is indicative of one or more slot formats forslot 10, slot 11, slot 12, slot 13, slot 14, slot 15, slot 16 and slot17). In other words, if slot #n is with (logical) slot index “10”, slot#n+1 is with (logical) slot index “11”. In some examples, the UEapplying the SFI for slot #n+5 corresponds to the UE determining (and/orconsidering and/or assuming) a slot format of the slot #n+5 based uponan indication of the slot format of the slot #n+5 in the SFI relatedDCI.

In some examples, if the UE does not apply the SFI for a slot, the UEmay determine (and/or consider and/or assume) a slot format (and/or atransmission direction and/or a functionality) of the slot based uponthe SFI.

In some examples, the UE may determine (and/or consider and/or assume)one or more slot formats of one or more slots within a channel occupancybased upon an SFI related DCI (e.g., DCI format 2_0) received within thechannel occupancy (and/or a different channel occupancy).

In an example, the UE receives a DCI format 2_0 (and/or a different typeof SFI related DCI) in slot #n. The DCI format 2_0 may be indicative ofone or more slot formats associated with 10 slots. A first channeloccupancy may be associated with slots from slot #n through slot #n+3and/or a second channel occupancy may be associated with slots from slot#n+7 through slot #n+11. Accordingly, slots from slot #n+4 through slot#n+6 are outside of a channel occupancy. The slots from slot #n+4through slot #n+6 being outside of a channel occupancy may correspond tothe slots from slot #n+4 through slot #n+6 not being associated withand/or not being within any channel occupancy (such as the first channeloccupancy and/or the second channel occupancy).

In the example, a subcarrier spacing for a downlink BWP of the UE may bethe same as a reference subcarrier spacing configured to the UE. In someexamples, the DCI format 2_0 may be indicative of 10 slot format values(and/or a different amount of slot format values). In some examples, ifthe UE applies the DCI format 2_0 for the second channel occupancy, theUE may apply slot format values from the eighth slot format valuethrough the tenth slot format value, of the 10 slot format values, forthe second channel occupancy. For example, if the UE applies the DCIformat 2_0 for the second channel occupancy, the UE may apply slotformat values from the fifth slot format value through the ninth slotformat value, of the 10 slot format values, for the second channeloccupancy. For example, the UE may apply slot format values from thefirst slot format value through the fourth slot format value, of the 10slot format values, for the first channel occupancy, and/or the UE mayapply the slot format values from the eighth slot format value throughthe tenth/last slot format value, of the 10 slot format values, for thesecond channel occupancy. For example, the eighth slot format value ofthe 10 slot format values may be applied for slot #n+7 of the secondchannel occupancy, the ninth slot format value of the 10 slot formatvalues may be applied for slot #n+8 of the second channel occupancyand/or the tenth slot format value of the 10 slot format values may beapplied for slot #n+9 of the second channel occupancy.

In some examples, the slot format values from the fifth slot formatvalue through the ninth slot format value may be applied for the slots,associated with the second channel occupancy, from slot #n+7 to slot#n+11.

In the example, the subcarrier spacing for the downlink BWP of the UEmay be different than the reference subcarrier spacing configured to theUE, such as the subcarrier spacing for the downlink BWP is 30 kHz and/orthe reference subcarrier spacing is 15 kHz. In some examples, the DCIformat 2_0 may be indicative of 5 slot format values (and/or a differentamount of slot format values). In some examples, a slot format value ofthe 5 slot format values may be indicative of one or more slot formatsfor two 30 kHz subcarrier spacing slots.

In some examples, if the UE applies the DCI format 2_0 for the secondchannel occupancy, the UE may apply slot format values from the fourthslot format value through the fifth slot format value, of the 5 slotformat values, for the second channel occupancy. For example, a fourthslot format value of the 5 slot format values may be indicative of aslot format of slot #n+7 of the second channel occupancy and/or a fifthslot format value of the 5 slot format values may be indicative of aslot format of slot #n+8 and a slot format of slot #n+9 of the secondchannel occupancy.

Alternatively and/or additionally, if the UE applies the DCI format 2_0for the second channel occupancy, the UE may apply slot format valuesfrom the third slot format value through the fifth slot format value, ofthe 5 slot format values, for the second channel occupancy. For example,a third slot format value of the 5 slot format values may be indicativeof a slot format of slot #n+7 and a slot format of slot #n+8 of thesecond channel occupancy, the fourth slot format value of the 5 slotformat values may be indicative of a slot format of slot #n+9 and a slotformat of slot #n+10 of the second channel occupancy and/or the fifthslot format value of the 5 slot format values may be indicative of aslot format of slot #n+11 of the second channel occupancy.

Alternatively and/or additionally, if the UE applies the DCI format 2_0for the second channel occupancy, the UE may apply slot format valuesfrom the first slot format value through the third slot format value, ofthe 5 slot format values, for the second channel occupancy. For example,a first slot format value of the 5 slot format values may be indicativeof a slot format of slot #n+7 and a slot format of slot #n+8 of thesecond channel occupancy, a second slot format value of the 5 slotformat values may be indicative of a slot format of slot #n+9 and a slotformat of slot #n+10 of the second channel occupancy and/or the thirdslot format value of the 5 slot format values may be indicative of aslot format of slot #n+11 of the second channel occupancy.

FIGS. 9A-9B illustrate an exemplary scenario 900 associated with slotformats of slots. FIG. 9A illustrates a representation of the exemplaryscenario 900. In some examples, an SFI related DCI 916 (e.g., a DCIformat 2_0) is received, by a UE, within a slot #n 920. For example, theSFI related DCI 916 may be received during a beginning portion of theslot #n 920. In some examples, a first channel indicator 902 is receivedby the UE within the slot #n 920. For example, the first channelindicator 902 may be received during a beginning portion of the slot #n920.

In some examples, a first time period 924 may be associated with a firstCOT. For example, the UE may determine (and/or assume and/or consider)that the first COT corresponds to the first time period 924. In someexamples, the first COT is associated with a network. In some examples,the first time period 924 begins at a time that the first channelindicator 902 is received by the UE. Alternatively and/or additionally,the UE may determine (and/or be aware) that the first time period 924and/or the first COT ends in association with an OFDM symbol #m 906 inslot #n+2 (e.g., the UE may determine (and/or be aware) that an endingposition of the first time period 924 and/or the first COT is at theOFDM symbol #m 906 in the slot #n+2). In some examples, the first timeperiod 924 may comprise at least a portion of the slot #n 920, slot #n+1(following the slot #n 920) and/or a portion of the slot #n+2 (followingthe slot #n+1). Alternatively and/or additionally, the first time period924 may range from a beginning of the slot #n 920 (where the UE receivesthe first channel indicator 902) to an ending symbol. The ending symbolcorresponds to the OFDM symbol #m 906 of the slot #n+2.

In some examples, a second channel indicator 910 is received by the UEwithin a slot #n+5 922. For example, the first channel indicator 902 maybe received during a beginning portion of the slot #n+5 922.

In some examples, a second time period 926 may be associated with asecond COT. For example, the UE may determine (and/or assume and/orconsider) that the second COT corresponds to the second time period 926.In some examples, the second COT is associated with the network. In someexamples, the second time period 926 begins at a time that the secondchannel indicator 910 is received by the UE. In some examples, thesecond time period 926 may comprise at least a portion of the slot #n+5922, slot #n+6 (following the slot #n+5 922) and/or a portion of slot#n+7 (following the slot #n+6). Alternatively and/or additionally, thesecond time period 926 may range from a beginning of the slot #n+5 922(where the UE receives the second channel indicator 910) to an endingsymbol of the slot #n+7.

In some examples, the first time period 924 may correspond to aninterpretation, by the UE, of the first COT (e.g., the first time period924 may correspond to a version of the first COT from the UE's view).For example, the UE may consider and/or assume that the first timeperiod 924 corresponds to the first COT. In some examples, a third timeperiod 904 may be associated with the first COT. For example, thenetwork may determine (and/or consider and/or assume) that the first COTcorresponds to the third time period 904. In some examples, the thirdtime period 904 may correspond to an interpretation, by the network, ofthe first COT (e.g., the third time period 904 may correspond to aversion of the first COT from the network's view). The third time period904 may comprise a portion of a slot preceding the slot #n 920.

In some examples, the second time period 926 may correspond to aninterpretation, by the UE, of the second COT (e.g., the second timeperiod 926 may correspond to a version of the second COT from the UE'sview). For example, the UE may consider and/or assume that the secondtime period 926 corresponds to the second COT. In some examples, afourth time period 912 may be associated with the second COT. Forexample, the network may determine (and/or consider and/or assume) thatthe second COT corresponds to the fourth time period 912. In someexamples, the fourth time period 912 may correspond to aninterpretation, by the network, of the second COT (e.g., the fourth timeperiod 912 may correspond to a version of the second COT from thenetwork's view). The fourth time period 912 may comprise a portion of aslot #n+4 preceding the slot #n+5 922, wherein the portion of the slot#n+4 may comprise a symbol #p 908 of the slot #n+4 and/or one or moresymbols of the slot #n+4 following the symbol #p 908 of the slot #n+4.

FIG. 9B illustrates a representation of slots associated with the SFIrelated DCI 916 (e.g., the DCI format 2_0). In some examples, the SFIrelated DCI 916 is indicative of one or more slot formats associatedwith 6 slots 928. For example, the 6 slots 928 may be associated withthe first time period 924, a time outside a COT 936 and/or a portion ofthe second time period 938. In some examples, the portion of the secondtime period 938 comprises the slot #n+5 922.

In some examples, the UE determines (and/or considers and/or assumes)one or more slot formats associated with the first time period 924 basedupon the SFI related DCI 916 (e.g., the DCI format 2_0). In someexamples, the UE determines (and/or considers and/or assumes) one ormore slot formats associated with slots within the first time period 924based upon the SFI related DCI 916 (e.g., the SFI related DCI 916 may beindicative of one or more slot formats associated with the slot #n 920,the slot #n+1 and/or the slot #n+2 associated with the first time period924). In some examples, the SFI related DCI 916 (and/or one or more slotformats indicated by the SFI related DCI 916) may be used and/or appliedfor merely a portion of OFDM symbols in the slot #n+2. In some examples,the portion of OFDM symbols in the slot #n+2 corresponds to symbols fromsymbol #0 through symbol #m of the slot #n+2. For example, the portionof OFDM symbols in the slot #n+2 are comprised within the first timeperiod 924.

In some examples, the UE does not use and/or apply one or more slotformats indicated by the SFI related DCI 916 for one or more slotsoutside the first time period 924. For example, the UE does not useand/or apply one or more slot formats indicated by the SFI related DCI916 for the slot #n+3, the slot #n+4 and/or the slot #n+5 922.

In some examples, the UE does not use and/or apply one or more slotformats indicated by the SFI related DCI 916 for one or more slotsoutside the first time period 924, until the UE receives a differentchannel indicator (such as the second channel indicator 910).

In some examples, the UE buffers and/or stores one or more slot formats,corresponding to slots outside the first time period 924, indicated bythe SFI related DCI 916, until the UE receives a different channelindicator (such as the second channel indicator 910).

In some examples, responsive to receiving the second channel indicator910, the UE may determine (and/or consider and/or assume) one or moreslot formats associated with the second time period 926 based upon theSFI related DCI 916. For example, the UE may determine (and/or considerand/or assume) a slot format associated with the slot #n+5 922 basedupon a slot format indicated by the SFI related DCI 916.

In some examples, responsive to receiving the second channel indicator910, the UE may determine (and/or consider and/or assume) one or moreslot formats of one or more slots within the second time period 926based upon the SFI related DCI 916. For example, the UE may determine(and/or consider and/or assume) a slot format associated with the slot#n+5 922 based upon a slot format indicated by the SFI related DCI 916.

In some examples, the SFI related DCI 916 (and/or one or more slotformats indicated by the SFI related DCI 916) may be not be used and/orapplied for OFDM symbols in the slot #n+4. In some examples, the OFDMsymbols in the slot #n+4 correspond to symbols from the symbol #p 908through symbol #13 of the slot #n+4. For example, the OFDM symbols inthe slot #n+4 are comprised within the time outside a COT 936illustrated in FIG. 9B.

In some examples, a channel indicator (e.g., the first channel indicator902 and/or the second channel indicator 910) is indicative of abeginning of a COT of a network (e.g., the channel indicator indicatesstarting of the COT of a network). In some examples, the channelindicator is indicative of a beginning of a time period (e.g., the firsttime period 924 and/or the second time period 926). For example, thechannel indicator indicates starting of the time period.

In some examples, the channel indicator is used for indicating a channeloccupancy and/or a COT. In some examples, a UE assumes that a COT of thenetwork starts at an OFDM symbol where the channel indicator isreceived. In some examples, the UE assumes that the OFDM symbol wherethe channel indicator is received is within the COT. In some examples,the COT of the network may start prior to transmission of the channelindicator by the network.

In some examples, the channel indicator may be a reference signal.Alternatively and/or additionally, the channel indicator may be a DMRSof a CORESET. Alternatively and/or additionally, the channel indicatormay be a DMRS of a CORESET on a (single) OFDM symbol. Alternativelyand/or additionally, the channel indicator may be a DMRS of a CORESETand/or a partial DMRS of a CORESET. Alternatively and/or additionally,the channel indicator may be a common signal. Alternatively and/oradditionally, the channel indicator may be a group common signal.

In some examples, the network transmits the channel indicator if (and/orafter) the network occupies a channel (associated with the channelindicator). For example, the network may transmit the channel indicatorresponsive to the network occupying the channel.

In some examples, the network transmits the channel indicator if (and/orafter) the network performs a channel access procedure and/or an LBTscheme successfully. For example, the network may transmit the channelindicator responsive to the network performing the channel accessprocedure and/or the LBT scheme successfully.

In some examples, if and/or after the UE detects and/or receives thechannel indicator, the UE determines that the COT of the network started(and/or is starting). For example, the UE is aware that the COT of thenetwork starts and/or begins if and/or after the UE detects and/orreceives the channel indicator. For example, responsive to the UEdetecting and/or receiving the channel indicator, the UE is aware thatthe COT of the network starts and/or begins.

In some examples, if and/or after the UE detects and/or receives thechannel indicator, the UE may determine (and/or assume and/or consider)that data transmission and/or data reception (for a duration of time) issimilar to data transmission and/or data reception associated with alicensed band and/or a licensed spectrum. For example, responsive to theUE detecting and/or receiving the channel indicator, the UE maydetermine (and/or assume and/or consider) that data transmission and/ordata reception (for a duration of time) is similar to data transmissionand/or data reception associated with a licensed band and/or a licensedspectrum.

In some examples, if and/or after the UE detects and/or receives thechannel indicator, the UE may determine (and/or assume and/or consider)that one or more slot formats and/or one or more frame structuresassociated with one or more slots may be determined based upon one ormore RRC signalings. For example, responsive to the UE detecting and/orreceiving the channel indicator, the UE may determine (and/or assumeand/or consider) that the one or more slot formats and/or the one ormore frame structures associated with the one or more slots may bedetermined based upon the one or more RRC signalings.

In some examples, if and/or after the UE detects and/or receives thechannel indicator, the UE may determine (and/or assume and/or consider)the one or more slot formats and/or the one or more frame structuresassociated with the one or more slots based upon the one or more RRCsignalings. For example, responsive to the UE detecting and/or receivingthe channel indicator, the UE may determine (and/or assume and/orconsider) the one or more slot formats and/or the one or more framestructures associated with the one or more slots based upon one or moreRRC signalings.

In some examples, the one or more RRC signalings comprisetdd-UL-DL-ConfigurationCommon, tdd-UL-DL-ConfigurationCommon2 and/ortdd-UL-DL-ConfigDedicated.

In some examples, if and/or after the UE detects and/or receives thechannel indicator, the UE may perform data transmission and/or datareception (for a duration of time) (similarly to data transmissionand/or data reception associated with a licensed band and/or a licensedspectrum). For example, responsive to the UE detecting and/or receivingthe channel indicator, the UE may perform data transmission and/or datareception (for a duration of time) (similarly to data transmissionand/or data reception associated with a licensed band and/or a licensedspectrum). In some examples, the data transmission may correspond toconfigured transmission, such as configured grant transmission, grantfree transmission, SRS transmission, reporting of one or more configureddownlink measurements and/or uplink transmission. In some examples, thedata reception may correspond to CORESET monitoring, downlink referencesignal measurement, CSI-RS measurement, SS-PBCH block measurement and/orSPS-PDSCH reception.

In some examples, the UE detecting a COT corresponds to the UEdetermining that the network and/or the UE are (currently) able toperform one or more transmissions (continuously) for a time period(e.g., the COT) after successful performance of a channel accessprocedure and/or an LBT scheme.

In some examples, a channel occupancy corresponds to a wireless nodeperforming transmission in an unlicensed spectrum and/or an unlicensedchannel for a time period after successful performance of a channelaccess procedure and/or an LBT scheme.

In some examples, the time period corresponds to a COT where thewireless node is able to perform one or more transmissions(continuously). In some examples, the wireless node may perform, withinthe COT, one or more transmissions without performing a second channelaccess procedure and/or a second LBT scheme.

In some examples, a UE detecting a channel occupancy and/or a COTcorresponds to the UE determining that a network and/or the UE are(currently) able to perform one or more transmissions (continuously) fora time period (e.g., the COT) after successful performance of a channelaccess procedure and/or an LBT scheme.

In some examples, an available SFI monitoring occasion corresponds to anSFI monitoring occasion within a COT.

In some examples, the COT is obtained by a network. In some examples,the COT is obtained by a UE. In some examples, the COT is obtained bythe network and/or the UE.

In some examples, the UE receives a signal. In some examples, the signalis received within a time period. In some examples, the signal isindicative of an ending position and/or an ending slot of the timeperiod and/or an ending OFDM symbol within the ending slot. In someexamples, the ending position corresponds to the ending slot and/or theending OFDM symbol within the ending slot.

In some examples, the ending position of the time period is determinedbased upon the signal. In some examples, the ending position of the timeperiod is determined based upon a maximum value, an MCOT and/or a COTused for a network after a (successfully performed) channel accessprocedure and/or an LBT scheme.

In some examples, the network transmits one or more signals to the UEfor indicating the ending position of the time period. In some examples,the UE expects that the one or more signals, received on one or moremonitoring occasions in the time period, are indicative of the (same)ending position. For example, the UE expects that the one or moresignals, received on one or more monitoring occasions in the timeperiod, are indicative of the (same) ending slot and/or the (same)ending OFDM symbol within the ending slot. In some examples, the UEdetermines the ending position based upon the one or more signals(and/or the signal).

In some examples, after (a time corresponding to) the ending slot, theUE does not receive a configured data channel (and/or the UE does nottransmit a configured data channel) until the UE detects a (next)channel occupancy associated with the network, until the UE receives atransmission from the network and/or until the UE (successfully)performs a clear channel assessment and/or an LBT procedure.

In some examples, after (a time corresponding to) the ending slot, theUE does not receive a configured reference signal for channelmeasurement (and/or the UE does not transmit a configured referencesignal for channel measurement) until the UE detects a (next) channeloccupancy associated with the network, until the UE receives atransmission from the network and/or until the UE (successfully)performs a clear channel assessment and/or an LBT procedure.

In some examples, after (a time corresponding to) the ending slot, theUE does not monitor and/or detect one or more configured CORESETs untilthe UE detects a (next) channel occupancy associated with the network,until the UE receives a transmission from the network and/or until theUE (successfully) performs a clear channel assessment and/or an LBTprocedure.

In some examples, after (a time corresponding to) the ending slot, theUE does not transmit PRACH on a configured PRACH transmission occasionuntil the UE detects a (next) channel occupancy associated with thenetwork, until the UE receives a transmission from the network and/oruntil the UE (successfully) performs a clear channel assessment and/oran LBT procedure.

In some examples, after (a time corresponding to) the ending slot, theUE does not monitor and/or detect one or more configured CORESETs untilthe UE detects a (next) channel occupancy associated with the network,until the UE receives a transmission from the network and/or until theUE (successfully) performs a clear channel assessment and/or an LBTprocedure.

In some examples, an SFI is indicative of a slot combination for aserving cell. In some examples, a slot combination comprises one or moreslot format values. In some examples, a slot format value is indicativeof a slot format of a slot. In some examples, a slot format value isindicative of a transmission direction, a functionality and/or a stateof an OFDM symbol in a slot. In some examples, a slot format value isindicative of a transmission direction, a functionality and/or a stateof each OFDM symbol of a plurality of OFDM symbols in a slot. In someexamples, an SFI is indicated by a DCI (e.g., an SFI related DCI). Insome examples, the DCI is a DCI format 2_0.

In some examples or above mentioned examples, a time period maycorrespond to a COT of the serving cell. Alternatively and/oradditionally, the UE may consider that the time period is the COT of theserving cell.

Various techniques of the present disclosure may be performedindependently and/or separately from one another. Alternatively and/oradditionally, various techniques of the present disclosure may becombined and/or implemented using a single system. Alternatively and/oradditionally, various techniques of the present disclosure may beimplemented simultaneously.

FIG. 10 is a flow chart 1000 according to one exemplary embodiment fromthe perspective of a UE. In step 1005, the UE receives an SFI for aserving cell in an unlicensed spectrum, wherein the SFI is indicative ofa slot format of one or more slots of the serving cell. In step 1010, ifa slot and/or an OFDM symbol indicated by the SFI is within a timeperiod, the UE applies the SFI (and/or a portion of the SFI) for theslot and/or the OFDM symbol. Alternatively and/or additionally, if aslot and/or an OFDM symbol indicated by the SFI is outside the timeperiod, the UE performs one or more actions.

In the context of the embodiment illustrated in FIG. 10 and discussedabove, the time period may correspond to a COT. Alternatively and/oradditionally, the time period may correspond to a time period that theUE determines (and/or assumes and/or considers) is the COT.

In some examples, the SFI is transmitted on the serving cell (e.g., theSFI may be received by the UE via the serving cell). In some examples,the SFI is indicative of one or more transmission directions and/or oneor more functionalities of one or more OFDM symbols.

In some examples, if a slot and/or an OFDM symbol indicated by the SFIis within the time period, the UE determines (and/or considers and/orassumes) a slot format of the slot and/or the OFDM symbol based upon theSFI (and/or a portion of the SFI corresponding to the slot and/or theOFDM symbol).

In some examples, if a slot and/or an OFDM symbol indicated by the SFIis outside the time period, the UE does not apply the SFI for the slotand/or the OFDM symbol.

In some examples, the one or more actions comprises the UE discardingand/or ignoring the SFI.

In some examples, the one or more actions comprises the UE storingand/or buffering the SFI until one or more of next SFI monitoringoccasion (e.g., a next available monitoring occasion), the UE receivinga channel indicator, the UE receiving an indication of a channeloccupancy (after the COT and/or the time period), and/or the UE beingindicated of a channel occupancy (after the COT and/or the time period).

In some examples, the one or more actions comprises the UE applying theSFI from (a time during) a second slot and/or a second OFDM symbol,wherein the UE detects a channel occupancy (after the COT and/or thetime period) for the serving cell in the second slot and/or the secondOFDM symbol.

In some examples, the one or more actions comprises the UE applying theSFI from (a time during) a second slot and/or a second OFDM symbol,wherein the UE receives (from a network) a channel indicator (after theCOT and/or the time period) for the serving cell in the second slotand/or the second OFDM symbol.

In some examples, the one or more actions comprises the UE applying theSFI responsive to receiving and/or detecting a channel indicator.

In some examples, the one or more actions comprises the UE not applyingthe SFI if the UE does not receive and/or does not detect a channelindicator. In some examples, the UE performing the one or more actionscomprises the UE not applying the SFI, after the COT, until the UEreceives and/or detects a channel indicator.

In some examples, the one or more actions comprises the UE applying theSFI responsive to receiving and/or detecting a channel indicator,wherein the channel indicator indicates the SFI is available.

In some examples, the one or more actions comprises the UE applying theSFI responsive to receiving and/or detecting a channel indicator afterreceiving the SFI, wherein the channel indicator indicates the SFI isavailable.

In some examples, the one or more actions comprises the UE not applyingthe SFI responsive to receiving and/or detecting a channel indicator,wherein the channel indicator indicates the SFI is not available.

In some examples, the one or more actions comprises the UE not applyingthe SFI responsive to receiving and/or detecting a channel indicatorafter receiving the SFI, wherein the channel indicator indicates the SFIis not available.

In some examples, the COT is obtained by a network. In some examples,the COT is obtained by the UE.

In some examples, a channel indicator is indicative of a beginning of aCOT of a network (e.g., the channel indicator indicates starting of theCOT of a network).

In some examples, the UE may determine (and/or consider and/or assume)that a COT of a network starts at an OFDM symbol where the channelindicator is received.

In some examples, if and/or after the UE detects and/or receives achannel indicator, the UE determines and/or considers that a COT of thenetwork started (and/or is starting).

In some examples, a channel occupancy corresponds to a wireless nodeperforming transmission in an unlicensed spectrum and/or an unlicensedchannel for a time period after successful performance of a channelaccess procedure and/or an LBT scheme. In some examples, the time periodcorresponds to a COT where the wireless node is able to perform one ormore transmissions (continuously). In some examples, the wireless nodemay perform, within the COT, one or more transmissions withoutperforming a second channel access procedure and/or a second LBT scheme.

In some examples, a UE detecting a channel occupancy and/or a COTcorresponds to the UE determining that a network and/or the UE are(currently) able to perform one or more transmissions (continuously) fora time period (e.g., the COT) after successful performance of a channelaccess procedure and/or an LBT scheme.

In some examples, a channel occupancy corresponds to a wireless nodeperforming transmission in an unlicensed spectrum and/or an unlicensedchannel for a time period after successful performance of a channelaccess procedure and/or an LBT scheme. In some examples, the time periodcorresponds to a COT where the wireless node is able to perform one ormore transmissions (continuously). In some examples, the wireless nodemay perform, within the COT, one or more transmissions withoutperforming a second channel access procedure and/or a second LBT scheme.

In some examples, an SFI is indicative of a slot combination for aserving cell. In some examples, a slot combination comprises one or moreslot format values. In some examples, a slot format value is indicativeof a slot format of a slot. In some examples, a slot format value isindicative of a transmission direction and/or a functionality of an OFDMsymbol in a slot. In some examples, a slot format value is indicative ofa transmission direction and/or a functionality of each OFDM symbol of aplurality of OFDM symbols in a slot. In some examples, an SFI isindicated by a DCI (e.g., an SFI related DCI). In some examples, the DCIis a DCI format 2_0.

FIG. 11 is a flow chart 1100 according to one exemplary embodiment fromthe perspective of a UE. In step 1105, the UE receives an SFI within afirst COT of a serving cell, wherein the SFI is indicative of one ormore slot formats of one or more slots of the serving cell. In step1110, the UE receives a first signal indicative of an ending position ofthe first COT, wherein a beginning of at least one slot of the one ormore slots is after the ending position (e.g., a time corresponding tothe beginning of the at least one slot is after a time corresponding tothe ending position). In step 1115, the UE determines whether to apply aslot format, of a slot of the one or more slots, to the slot based uponwhether the slot is within the first COT (and/or based upon whether theslot is completely within the first COT), wherein the slot format of theslot is indicated by the SFI.

Referring back to FIGS. 3 and 4, in one exemplary embodiment of a UE,the device 300 includes a program code 312 stored in the memory 310. TheCPU 308 may execute program code 312 to enable the UE (i) to receive anSFI within a first COT of a serving cell, wherein the SFI is indicativeof one or more slot formats of one or more slots of the serving cell,(ii) to receive a first signal indicative of an ending position of thefirst COT, wherein a beginning of at least one slot of the one or moreslots is after the ending position, and (iii) to determine whether toapply a slot format, of a slot of the one or more slots, to the slotbased upon whether the slot is within the first COT (and/or based uponwhether the slot is completely within the first COT), wherein the slotformat of the slot is indicated by the SFI. Furthermore, the CPU 308 canexecute the program code 312 to perform some and/or all of theabove-described actions and steps and/or others described herein.

In the context of the embodiments illustrated in FIG. 11, and discussedabove, the UE may apply a slot format, of the slot, to the slotresponsive to a determination that the slot is within the first COT(and/or responsive to a determination that the slot is completely withinthe first COT), wherein the slot format of the slot is indicated by theSFI.

In some examples, the UE may apply a slot format, of a portion of theslot, to the portion of the slot responsive to a determination that theportion of the slot is within the first COT (and/or responsive to adetermination that the portion of the slot is completely within thefirst COT), wherein the slot format is indicated by the SFI.Alternatively and/or additionally, the UE may apply a partial slotformat of a slot to a portion of the slot responsive to a determinationthat the portion of the slot is within the first COT, wherein thepartial slot format of the slot corresponds to the portion of the slotand/or the partial slot format of the slot is indicated by the SFI.

In some examples, the UE may not apply and/or may discard a slot formatof a portion of the slot if the portion of the slot is outside the firstCOT (and/or if the portion of the slot is completely outside the firstCOT) and/or if the portion of the slot is not within (and/or does notoverlap with) a COT (e.g., any COT) of the serving cell. Alternativelyand/or additionally, the UE may discard a partial slot format of theslot and/or may not apply the partial slot format of the slot to aportion of the slot responsive to a determination that the portion ofthe slot is outside the first COT and/or a determination that theportion of the slot is not within a COT of the serving cell, wherein thepartial slot format of the slot corresponds to the portion of the slotand/or the partial slot format of the slot is indicated by the SFI.

In some examples, the UE may derive a slot format of a portion of theslot based upon a semi-static slot structure if the portion of the slotis outside the first COT, if the portion of the slot is not within(and/or does not overlap with) a COT (e.g., any COT) of the serving celland/or if the portion of the slot is within a second COT of the servingcell, wherein the second COT is after the first COT.

In some examples, the UE may not apply and/or may discard a slot formatof the slot if the slot is outside the first COT (and/or if the slot iscompletely outside the first COT) and/or if the slot is not within(and/or does not overlap with) a COT (e.g., any COT) of the servingcell, wherein the slot format of the slot is indicated by the SFI.

In some examples, the UE may derive a slot format of the slot based upona semi-static slot structure responsive to a determination that the slotis outside the first COT, a determination that the slot is not within(and/or does not overlap with) a COT (e.g., any COT) of the serving celland/or a determination that the slot is within a second COT of theserving cell, wherein the second COT is after the first COT.

In some examples, the UE may not receive a second SFI (and/or any SFI)for the serving cell between a time corresponding to reception of theSFI and a time corresponding to the slot. In some examples, the timecorresponding to reception of the SFI corresponds to a time after and/orduring reception of the SFI by the UE. In some examples, the timecorresponding to the slot corresponds to a time before and/or within theslot.

In some examples, if a slot format of the slot is discarded and/or notapplied, the UE may determine (and/or consider and/or assume) that aslot format, a transmission direction, a functionality and/or a state ofone or more OFDM symbols of the slot are flexible, wherein the slotformat of the slot is indicated by the SFI.

In some examples, responsive to discarding and/or not applying a slotformat of the slot, the UE may perform detection and/or sensing (and/ormonitoring) of a second signal indicative of a second COT of the servingcell, wherein the slot format of the slot is indicated by the SFI. Forexample, the UE may perform detection and/or sensing (and/or monitoring)of the second signal and/or the UE may receive the second signal withinand/or after the slot.

In some examples, responsive to discarding and/or not applying a slotformat of the slot, the UE may not perform reception of a configuredphysical channel and/or a reference signal, wherein the slot format ofthe slot is indicated by the SFI.

In some examples, responsive to discarding and/or not applying a slotformat of the slot, the UE may not perform transmission of a configuredphysical channel and/or a reference signal, wherein the slot format ofthe slot is indicated by the SFI.

It may be appreciated that applying one or more of the techniquespresented herein may result in one or more benefits including, but notlimited to, increasing an operating efficiency of a UE as a result ofthe UE not performing data reception and/or data transmission in one ormore slots outside a COT (e.g., any COT) if the UE receives an SFI,associated with a serving cell, indicative of one or more slot formatsof the one or more slots outside a channel occupancy (e.g., any channeloccupancy) and/or a COT (e.g., any COT) associated with the servingcell.

A communication device (e.g., a UE, a base station, a network node,etc.) may be provided, wherein the communication device may comprise acontrol circuit, a processor installed in the control circuit and/or amemory installed in the control circuit and coupled to the processor.The processor may be configured to execute a program code stored in thememory to perform method steps illustrated in one or more of FIGS.10-11. Furthermore, the processor may execute the program code toperform some and/or all of the above-described actions and steps and/orothers described herein.

Various aspects of the disclosure have been described above. It shouldbe apparent that the teachings herein may be embodied in a wide varietyof forms and that any specific structure, function, or both beingdisclosed herein is merely representative. Based on the teachings hereinone skilled in the art should appreciate that an aspect disclosed hereinmay be implemented independently of any other aspects and that two ormore of these aspects may be combined in various ways. For example, anapparatus may be implemented or a method may be practiced using anynumber of the aspects set forth herein. In addition, such an apparatusmay be implemented or such a method may be practiced using otherstructure, functionality, or structure and functionality in addition toor other than one or more of the aspects set forth herein. As an exampleof some of the above concepts, in some aspects concurrent channels maybe established based on pulse repetition frequencies. In some aspectsconcurrent channels may be established based on pulse position oroffsets. In some aspects concurrent channels may be established based ontime hopping sequences. In some aspects concurrent channels may beestablished based on pulse repetition frequencies, pulse positions oroffsets, and time hopping sequences.

Those of skill in the art would understand that information and signalsmay be represented using any of a variety of different technologies andtechniques. For example, data, instructions, commands, information,signals, bits, symbols, and chips that may be referenced throughout theabove description may be represented by voltages, currents,electromagnetic waves, magnetic fields or particles, optical fields orparticles, or any combination thereof.

Those of skill would further appreciate that the various illustrativelogical blocks, modules, processors, means, circuits, and algorithmsteps described in connection with the aspects disclosed herein may beimplemented as electronic hardware (e.g., a digital implementation, ananalog implementation, or a combination of the two, which may bedesigned using source coding or some other technique), various forms ofprogram or design code incorporating instructions (which may be referredto herein, for convenience, as “software” or a “software module”), orcombinations of both. To clearly illustrate this interchangeability ofhardware and software, various illustrative components, blocks, modules,circuits, and steps have been described above generally in terms oftheir functionality. Whether such functionality is implemented ashardware or software depends upon the particular application and designconstraints imposed on the overall system. Skilled artisans mayimplement the described functionality in varying ways for eachparticular application, but such implementation decisions should not beinterpreted as causing a departure from the scope of the presentdisclosure.

In addition, the various illustrative logical blocks, modules, andcircuits described in connection with the aspects disclosed herein maybe implemented within or performed by an integrated circuit (“IC”), anaccess terminal, or an access point. The IC may comprise a generalpurpose processor, a digital signal processor (DSP), an applicationspecific integrated circuit (ASIC), a field programmable gate array(FPGA) or other programmable logic device, discrete gate or transistorlogic, discrete hardware components, electrical components, opticalcomponents, mechanical components, or any combination thereof designedto perform the functions described herein, and may execute codes orinstructions that reside within the IC, outside of the IC, or both. Ageneral purpose processor may be a microprocessor, but in thealternative, the processor may be any conventional processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices, e.g., a combinationof a DSP and a microprocessor, a plurality of microprocessors, one ormore microprocessors in conjunction with a DSP core, or any other suchconfiguration.

It is understood that any specific order or hierarchy of steps in anydisclosed process is an example of a sample approach. Based upon designpreferences, it is understood that the specific order or hierarchy ofsteps in the processes may be rearranged while remaining within thescope of the present disclosure. The accompanying method claims presentelements of the various steps in a sample order, and are not meant to belimited to the specific order or hierarchy presented.

The steps of a method or algorithm described in connection with theaspects disclosed herein may be embodied directly in hardware, in asoftware module executed by a processor, or in a combination of the two.A software module (e.g., including executable instructions and relateddata) and other data may reside in a data memory such as RAM memory,flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a harddisk, a removable disk, a CD-ROM, or any other form of computer-readablestorage medium known in the art. A sample storage medium may be coupledto a machine such as, for example, a computer/processor (which may bereferred to herein, for convenience, as a “processor”) such theprocessor can read information (e.g., code) from and write informationto the storage medium. A sample storage medium may be integral to theprocessor. The processor and the storage medium may reside in an ASIC.The ASIC may reside in user equipment. In the alternative, the processorand the storage medium may reside as discrete components in userequipment. Moreover, in some aspects any suitable computer-programproduct may comprise a computer-readable medium comprising codesrelating to one or more of the aspects of the disclosure. In someaspects a computer program product may comprise packaging materials.

While the disclosed subject matter has been described in connection withvarious aspects, it will be understood that the disclosed subject matteris capable of further modifications. This application is intended tocover any variations, uses or adaptation of the disclosed subject matterfollowing, in general, the principles of the disclosed subject matter,and including such departures from the present disclosure as come withinthe known and customary practice within the art to which the disclosedsubject matter pertains.

The invention claimed is:
 1. A method of a User Equipment (UE),comprising: receiving a Slot Format Indication (SFI) within a firstChannel Occupancy Time (COT) of a serving cell, wherein the SFI isindicative of one or more slot formats of one or more slots of theserving cell; receiving a first signal indicative of an ending positionof the first COT, wherein a beginning of at least one slot of the one ormore slots is after the ending position; and determining whether toapply a slot format, of a slot of the one or more slots, to the slotbased upon whether the slot is within the first COT, wherein the slotformat of the slot is indicated by the SFI.
 2. The method of claim 1,comprising: applying a slot format of a slot to the slot responsive to adetermination that the slot is within the first COT, wherein the slotformat is indicated by the SFI.
 3. The method of claim 1, comprising:applying a partial slot format of a slot to a portion of the slotresponsive to a determination that the portion of the slot is within thefirst COT, wherein the partial slot format of the slot corresponds tothe portion of the slot and the partial slot format of the slot isindicated by the SFI.
 4. The method of claim 1, comprising: at least oneof discarding a partial slot format of a slot or not applying thepartial slot format of the slot to a portion of the slot responsive toat least one of: a determination that the portion of the slot is outsidethe first COT; or a determination that the portion of the slot is notwithin a COT of the serving cell, wherein the partial slot format of theslot corresponds to the portion of the slot and the partial slot formatof the slot is indicated by the SFI.
 5. The method of claim 1,comprising: deriving a slot format of a portion of the slot based uponat least a semi-static slot structure responsive to at least one of: adetermination that the portion of the slot is outside the first COT; adetermination that the portion of the slot is not within a COT of theserving cell; or a determination that the portion of the slot is withina second COT of the serving cell, wherein the second COT is after thefirst COT.
 6. The method of claim 1, comprising: at least one ofdiscarding or not applying a slot format of the slot responsive to atleast one of: a determination that the slot is outside the first COT; ora determination that the slot is not within a COT of the serving cell,wherein the slot format of the slot is indicated by the SFI.
 7. Themethod of claim 1, comprising: deriving a slot format of the slot basedupon at least a semi-static slot structure responsive to at least oneof: a determination that the slot is outside the first COT; adetermination that the slot is not within a COT of the serving cell; ora determination that the slot is within a second COT of the servingcell, wherein the second COT is after the first COT.
 8. The method ofclaim 1, wherein the UE does not receive a second SFI for the servingcell between a time corresponding to reception of the SFI and a timecorresponding to a symbol of the slot.
 9. The method of claim 1,comprising: determining that at least one of a slot format, atransmission direction or a functionality of one or more orthogonalfrequency-division multiplexing (OFDM) symbols of the slot are flexibleif a slot format of the slot is at least one of discarded or notapplied, wherein the slot format of the slot is indicated by the SFI.10. The method of claim 1, comprising: responsive to at least one ofdiscarding or not applying a slot format of the slot: not performingreception of at least one of a configured physical channel or areference signal, wherein the slot format of the slot is indicated bythe SFI.
 11. A communication device, comprising: a processor; and memorycomprising processor-executable instructions that when executed by theprocessor cause performance of operations, the operations comprising:receiving a Slot Format Indication (SFI) within a first ChannelOccupancy Time (COT) of a serving cell, wherein the SFI is indicative ofone or more slot formats of one or more slots of the serving cell;receiving a first signal indicative of an ending position of the firstCOT, wherein a beginning of at least one slot of the one or more slotsis after the ending position; and determining whether to apply a slotformat, of a slot of the one or more slots, to the slot based uponwhether the slot is within the first COT, wherein the slot format of theslot is indicated by the SFI.
 12. The communication device of claim 11,the operations comprising: applying a slot format of a slot to the slotresponsive to a determination that the slot is within the first COT,wherein the slot format is indicated by the SFI.
 13. The communicationdevice of claim 11, the operations comprising: applying a partial slotformat of a slot to a portion of the slot responsive to a determinationthat the portion of the slot is within the first COT, wherein thepartial slot format of the slot corresponds to the portion of the slotand the partial slot format of the slot is indicated by the SFI.
 14. Thecommunication device of claim 11, the operations comprising: at leastone of discarding a partial slot format of a slot or not applying thepartial slot format of the slot to a portion of the slot responsive toat least one of: a determination that the portion of the slot is outsidethe first COT; or a determination that the portion of the slot is notwithin a COT of the serving cell, wherein the partial slot format of theslot corresponds to the portion of the slot and the partial slot formatof the slot is indicated by the SFI.
 15. The communication device ofclaim 11, the operations comprising: deriving a slot format of a portionof the slot based upon at least a semi-static slot structure responsiveto at least one of: a determination that the portion of the slot isoutside the first COT; a determination that the portion of the slot isnot within a COT of the serving cell; or a determination that theportion of the slot is within a second COT of the serving cell, whereinthe second COT is after the first COT.
 16. The communication device ofclaim 11, the operations comprising: at least one of discarding or notapplying a slot format of the slot responsive to at least one of: adetermination that the slot is outside the first COT; or a determinationthat the slot is not within a COT of the serving cell, wherein the slotformat of the slot is indicated by the SFI.
 17. The communication deviceof claim 11, the operations comprising: deriving a slot format of theslot based upon at least a semi-static slot structure responsive to atleast one of: a determination that the slot is outside the first COT; adetermination that the slot is not within a COT of the serving cell; ora determination that the slot is within a second COT of the servingcell, wherein the second COT is after the first COT.
 18. Thecommunication device of claim 11, wherein the communication device doesnot receive a second SFI for the serving cell between a timecorresponding to reception of the SFI and a time corresponding to asymbol of the slot.
 19. The communication device of claim 11, theoperations comprising: determining that at least one of a slot format, atransmission direction or a functionality of one or more orthogonalfrequency-division multiplexing (OFDM) symbols of the slot are flexibleif a slot format of the slot is at least one of discarded or notapplied, wherein the slot format of the slot is indicated by the SFI.20. A non-transitory computer-readable medium comprisingprocessor-executable instructions that when executed cause performanceof operations, comprising: receiving a Slot Format Indication (SFI)within a first Channel Occupancy Time (COT) of a serving cell, whereinthe SFI is indicative of one or more slot formats of one or more slotsof the serving cell; receiving a first signal indicative of an endingposition of the first COT, wherein a beginning of at least one slot ofthe one or more slots is after the ending position; and determiningwhether to apply a slot format, of a slot of the one or more slots, tothe slot based upon whether the slot is within the first COT, whereinthe slot format of the slot is indicated by the SFI.
 21. A method of aUser Equipment (UE), comprising: receiving a Slot Format Indication(SFI) within a first Channel Occupancy Time (COT) of a serving cell,wherein the SFI is indicative of one or more slot formats of one or moreslots of the serving cell; receiving a first signal indicative of anending position of the first COT, wherein a beginning of at least oneslot of the one or more slots is after the ending position; applying aslot format, of a first slot of the one or more slots, to the firstslot, wherein the first slot is within the first COT, and the slotformat of the first slot is indicated by the SFI; and not performingreception of at least one of a configured physical channel or areference signal on a second slot if the second slot is outside thefirst COT, wherein a second slot format of the second slot is indicatedby the SFI.